JERSEY CITY -- A 37-year-old Jersey City man was arrested Friday after allegedly exposing himself and masturbating in front of a 15-year-old girl sitting across from him on an NJ Transit bus in the city, authorities said.

Donn M. Ronquillo, of Grove Street, was charged with aggravated criminal sexual contact, Port Authority Police said.

The alleged incident happened at about 2 p.m. Friday at Bergen Avenue and Sipp Avenue, authorities said.

The girl screamed and the bus driver alerted Port Authority Police, who were outside the bus, authorities said.

Police then arrested Ronquillo, who is being held at the Hudson County Correctional Facility in Kearny, authorities said.

Brent Johnson may be reached at bjohnson@njadvancemedia.com. Follow him on Twitter @johnsb01.