HOUSTON -

Houston police have released sketches of three men accused of threatening small children during a spree of violent home invasions.

The first break-in happened at a home on Belbay Street and Bellfort Avenue in southeast Houston.

According to investigators, the armed crooks posed as police officers.

Detectives said the men broke into the home then threatened to hurt the homeowner's children to make their parents turn over their money jewelry.

Investigators said the men did the same during another home invasion on Richwood Road and Northdale Street in December 2012.

The most recent break-in happened in April on Dieppe Street near Jutland Road.

In that case, police said the men held the homeowner at gunpoint before ransacking the home.

Police stressed these crimes are still under investigation but believe the men pictured in these sketches are connected to all three home invasions.