A third suspect in the wounding of two New York Police Department officers has been captured in Pennsylvania, authorities said Thursday.

The New York Police Department and Pennsylvania state police confirmed that Robert J. Ellis was captured in Tannersville, Pa., near the place where another suspect was apprehended on Wednesday.

A bloodhound picked up Ellis’ scent. He saw police and initially tried to run, but did not resist when he was captured by two troopers, Pennsylvania State Police Captain James Murtin said.

“Mr. Ellis recognized that a pursuit was close at hand and attempted to flee,” said Mr. Murtin. “It does not appear he got very far.”

Ellis was found close to where he had first entered the woods on Wednesday. “It appears that he hunkered down for the night with no attempt to escape,” said Mr. Murtin.

On the run from an intense manhunt, the two suspects had threaded through three states to a remote road in northeastern Pennsylvania’s Pocono Mountains, police said. Investigators tracked them there, following a trail of muddy footprints and food wrappers.

The police dragnet stretched for about two miles along a median; officers used night-vision gear and infrared heat-sensing equipment to search the dark expanse for Ellis.

A passing motorist had alerted authorities around 6 p.m. Wednesday after seeing Ellis and the other suspect, Dexter Bostic, walking along a rural section of Interstate 80 on Wednesday afternoon, police said. State troopers chased and tackled a “winded” Bostic, Police Commissioner Raymond Kelly said, but Ellis got away.

A third ex-convict arrested in the case, Lee Woods, was ordered held without bail Wednesday on charges of attempted murder, assault on a police officer, weapon possession and other counts.

As a result of the shooting, which occurred during a traffic stop of a stolen SUV in Brooklyn, Officer Russel Timoshenko, 23, is paralyzed, has brain swelling and cannot breathe on his own, a assistant district attorney, Anna-Siegga Nicolazzi, said at Woods’ court appearance on Wednesday in a courtroom packed with police officers.

The other wounded officer, Herman Yan, saved by his bullet-resistant vest, was released from the hospital Tuesday.

Mayor Bloomberg issued a statement thanking law enforcers and “the extraordinary individuals whose tips helped lead to these captures.”

“I continue to ask all New Yorkers to pray for Officer Timoshenko, who remains in critical condition,” Mr. Bloomberg said. “I hope the fact that the suspects are now in custody and on their way to facing justice in New York City will provide some small measure of relief to the Timoshenko family during this terribly difficult time.”

Mr. Kelly congratulated investigators “for their outstanding work.”

“The capture of the last suspect in the shootings of our police officers has provided some relief in the otherwise grim reality that Officer Timoshenko remains gravely wounded,” said Mr. Kelly.

President of the Patrolmen’s Benevolent Association, Patrick J. Lynch, offered “the deepest gratitude of all New York City police officers to all of the law enforcement officers who participated in the search for and capture of” the alleged “shooters of our brother officers Yan and Timoshenko.”

“Let it be known by all of those who think nothing of attacking an officer of the law that if you attack one of us anywhere in this country, you attack all of us, and that we will band together and work tirelessly to bring you to justice,” said Mr. Lynch.

The officers were shot in Brooklyn’s Crown Heights section at 2:30 a.m. Monday. They had pulled over the BMW sport utility vehicle, with Woods behind the wheel, after a computer check showed that the license plates didn’t match the vehicle, police said.

As the uniformed officers followed procedure by approaching from either side of the SUV, investigators believe, Bostic and Ellis simultaneously opened fire without warning, hitting Mr. Timoshenko first. Mr. Yan managed to return fire before the SUV sped away.

Investigators later determined that the SUV and the plates from a second vehicle had been stolen from a Long Island car dealership where Bostic worked. The stolen vehicle and three handguns were found ditched a few blocks from the scene of the shooting, police said.

Mr. Kelly said the men initially evaded police with the help of an unidentified man who agreed to drive them from Queens to the Poconos several hours after the shooting. Fearing they would be captured if they drove through New York City, they fled east into Long Island before taking a ferry to Connecticut, then northeast back through New York to Pennsylvania, Mr. Kelly said.

The men “purchased tuna fish, Saltine crackers, peanut butter and water” along the way, then told their driver to leave them on an isolated road not far from Interstate 80, Kelly said.

On Tuesday afternoon, police, acting on a tip, located the driver, who revealed the suspects’ whereabouts. Dozens of NYPD investigators were dispatched to the area, where they joined local police in a search involving two bloodhounds and a German shepherd.

The searchers followed sets of footprints leading to a marsh, where they discovered tuna cans and cracker wrappers. The search dogs then picked up a trail that went cold in a creek bed about a mile away, Mr. Kelly said.

Bostic was quickly captured in a spot about 14 miles from where he was originally dropped off, Mr. Kelly said.