from www.nydailynews.com – Two more Brooklyn teenagers were arrested Tuesday in connection with a sexual assault on a young woman in Central Park, police said.

Shawn Martinez and Kelvin Dalrymple, both 18, turned themselves into police a day after a third suspect – Robert Gonzalez, also 18 – was charged with attempted rape and a criminal sex act for the pre-dawn Sunday attack.

Police Commissioner Raymond Kelly said the victim and her sister were riding the train from the Bronx into Manhattan when they struck up a conversation with the three teenagers.

After the victim’s sister exited the train, the 23-year-old victim agreed to ride the rails with the trio of teens to E. 86th St, Kelly said.

The group bought rolling papers at a drugstore, where their images were caught on crystal-clear surveillance video. They then went on a marijuana-fueled walk through the park at 3:30 a.m.

“They went to the park where they smoked these cigarettes,” Kelly said.

When they reached a secluded area in the park, the men knocked the woman to the ground and tore off her shirt and bra, police said.

They then forced the woman to perform a sex act on one of the teens while the other two watched and exposed themselves.

The woman then bit her attacker and the three teens ran from the park, police said. The woman staggered out of the park where a cab driver came to her aid, police said.

The woman initially told police that the men approached her on E. 86th St. while she was waiting for a crosstown bus and offered to safely escort her across the park. Investigators no longer believe that story, police sources said.

The footage from the drugstore led cops to Gonzalez, who surrendered Monday night. He is expected to be arraigned Tuesday afternoon in Manhattan Criminal Court.

Charges against Martinez and Dalrymple are pending, police said.