New York City police say they're investigating an altercation between officers and a pregnant woman that was captured on amateur video.

The video shows an officer struggling with a woman who police say tried to intervene in the arrest of her 17-year-old son Saturday in Brooklyn. The woman is pushed to the ground on her stomach.

Attorney Sanford Rubenstein says his client about 5 months pregnant.

The teen was charged with weapon possession, resisting arrest and harassment. His mother received a summons for disorderly conduct.

Two other men were charged with assault, resisting arrest and other charges.

Last week another officer from the same precinct was suspended after a video appeared to show him kicking a street fair vendor and walking away.