Investigators are delving into the cellphone used by a 35 year-old Brooklyn man in an effort to come up for a motive as to why he allegedly shot and killed of a Queens imam and his aide last weekend, high-ranking NYPD officials said Tuesday.

So far, police have not been able to come up with a motive in the case, NYPD Commissioner William Bratton said during a briefing with reporters on an unrelated matter.

Oscar Morel was formally charged Tuesday with first and second degree murder and related offenses for the August 13 execution style shooting of Imam Maulana Akonjee, 55, and Thara Uddin, 64, as they walked in traditional Muslim garb by the intersection of 79th Street and Liberty Avenue in Ozone Park. Chief of detectives Robert Boyce said Morel got on to the internet through his cellphone and that police computer crime experts have been going over the device. Cops have found pictures on the phone but Boyce said they haven’t shed any light on a possible motive.

“From family and friends, the ones we talked to, they cannot tell us why he did this,” said Boyce.