SAN ANTONIO -

A fire broke out at a Northwest Side apartment complex and San Antonio fire officials believe it was started by a Molotov Cocktail that was thrown through the window.

San Antonio firefighters responded to the fire around 11 p.m. Thursday at French Chalet Apartments in the 1600 block of Jackson Keller.

Witnesses reported seeing a group of men outside throw bricks into an apartment unit, then throw a flammable liquid through the window.

The men fled the scene after the fire broke out and the tenants inside had to put it out, fire officials said.

The arson unit was called to investigate. No one was injured and damage estimates were unknown.