OZONE PARK, Queens (WABC) -- Hundreds gathered near a mosque in Ozone Park, Queens to demand justice after 55-year-old Imam Maulama Akonjee and 64-year-old Tharam Uddin were killed - both shot in the head after leaving afternoon prayers."If you allow Muslims to be slaughtered in the streets in America, the only thing you are doing is taking America and her children backwards," says Imam Abdul Malik.As investigators worked, so many visited the Al-Furqan Masjid Mosque, that evening prayers overflowed into a front yard area.At times, too distraught to speak, the Imam's cousin shared that he was in shock."This is one hundred percent a hate crime," he said.Police say the two men were walking northbound on 79th Street near Liberty Avenue. The men were approached from behind, by what witnesses and video surveillance shows, a man with a medium complexion dressed in a dark polo shirt and shorts. Detectives say the man was seen fleeing the scene southbound on 79th Street with a gun in his hand."I just saw the Imam right there two nights ago - he saw me, and I shook his hand. He was a really nice person to everyone. No trouble, nothing," said Dmdad Haque.The Mayor's Office released a statement Saturday night saying,."Police say there was no argument before the shooting - the man just approached and fired. The investigation is currently ongoing.