HYDERABAD, India (AP) – Police detained a man Friday suspected of supplying the explosives used in last week’s deadly blast at a mosque in southern India, authorities said.

The suspect, a Muslim, was the first person picked up by police in connection with the bombing, and word of his detention came as police tightened security around the 17th century Mecca Masjid ahead of Friday prayers, which usually draws thousands of people.

A bomb went off at the mosque as Friday prayers were ending a week ago, killing 11 people. Another five people died in clashes that erupted after the blast between security forces and Muslim protesters who were angered by what they said was a lack of police protection.

The suspect, a 39-year-old kerosene dealer, was nabbed in Jalna, a city in western India, said a police official speaking on the condition of anonymity because the investigation is ongoing.

The official did not offer any further details about the suspect or the investigation.

At the Mecca Masjid, meanwhile, about 4,000 police officers backed by armored vehicles equipped with tear gas launchers were deployed to guard the structure at the first Friday prayers since the bombing.

A scuffle broke out Friday afternoon between worshippers who left the mosque chanting, “God is great,” and police officers in the area. Protesters threw stones and damaged parked cars while police beat them back with wooden batons. It was unclear if there were any serious injuries.

Hyderabad, a city of 7 million people – about 40 percent of them Muslim – has long been plagued by Hindu-Muslim tensions and occasional violence.

Muslim leaders in Hyderabad have said they do not trust local police to handle the investigation into the bombing, and authorities in the city on Thursday asked Indian federal investigators to take over the case, although it was not clear when that would happen.

Last week’s attack was the second time this year a mosque has been bombed in India.

On Sept. 8, a mosque in Malegaon, a city in western India, was bombed during a Muslim festival, killing 31 people.

Authorities arrested students who belonged to a banned Muslim group for the attack. The move upset many other Indian Muslims, who believe Hindu nationalists are to blame.

Apart from the mosque attacks, a series of bombings have hit India in the past year, including the July bombings of seven Mumbai commuter trains that killed more than 200 people. Most of the bombings have been blamed on Muslim militants based in neighboring Pakistan, India’s longtime rival.

Hindus represent more than 80 percent of India’s population, while Muslims account for 130 million of India’s 1.1 billion people.