New York City officials are still hunting for a man suspected of stabbing his girlfriend and all three of her children in a brutal attack at a hotel used as a homeless housing.

Michael Sykes was still on the lam Saturday. Detectives have been tracking his possible whereabouts since the Wednesday attack that left Rebecca Cutler and her 19-month-old and 5-month-old daughters dead. A 2-year-old remains critical.

Police say nobody apparently saw or heard what happened, but hotel surveillance shows Sykes entering Cutler's hotel room and leaving four minutes later. Police said he called his mother to say he had killed his girlfriend and was going to kill himself.

Sykes was seen on surveillance video taking a bus to the Staten Island Ferry. Authorities believe he is still alive.