GAZA CITY, Gaza Strip — Violence erupted in the Gaza Strip yesterday, with warring Palestinian Arab factions firing at each other and kidnapping rivals, and gunmen abducting a foreign news photographer.

The clashes in the Jebaliya refugee camp near Gaza City broke a weeklong pause in the violent confrontation between the Islamic Hamas, which controls the government, and President Abbas’s Fatah Party. In the past few weeks, 17 people have been killed in the fighting, leading to fears of civil war.

At least two people were wounded in the gunfire yesterday, security officials said, and reports of the numbers of Fatah and Hamas activists kidnapped ranged between three and 11. In the past, the kidnapped militants have usually been released unharmed.

Fatah-Hamas talks on a national unity government broke down several weeks ago. Frustrated by lack of progress, Mr. Abbas threatened to call an early election, but Hamas rejected that as an attempted coup and said it would boycott.

The renewed violence came despite a four-day Islamic holiday, “Feast of the Sacrifice,” when Palestinian Arabs usually concentrate on family visits instead of internal politics. Before sundown yesterday, gunmen abducted a photographer from the French news agency, AFP, from Gaza City. AFP identified the photographer as Jaime Razuri, 50, from Peru. An AFP reporter said the photographer was returning from Gaza and was abducted at gunpoint as he got out of his car with his driver.