A Roosevelt imam is calling on Muslims to get more involved in helping track others who may have potentially radicalized.

Isa Abdul Kareem believes all Muslims on Long Island should pay close attention and look for behavioral changes in fellow followers of Islam.

"Who would better be able to notice that than the Muslims who are around him, who pray with him, who live with him, who see him every day?" asks Kareem. "We could spot the change in our Muslim brother much quicker than let's say the FBI or any other intelligence group."

Rep. Peter King (R-Seaford) agrees.

"The fact is, there is a threat coming from the Muslim community," says King. "It's a small number but that's where the threat comes from. The Mafia came from the Italian-American community. The Westies came from the Irish-American community. You go where the threat is coming from."

Worshippers at the Islamic Center of Long Island in Westbury who spoke to News 12 Long Island agreed that everyone needs to be vigilant watching for people exhibiting erratic behavior.

"We have to help the police, the FBI -- we have to help them to stop this," says Hoque Mahmudua. "Stop the killing of innocent people."