Police arrested six suspects who were allegedly involved in a series of home invasions in Westchester, including the robbery and beating of an elderly Harrison couple last September.

According to police, John Mandracchia and Gary Pilavdjian, who was the contractor of William and Frieda Schwartz for two years, masterminded the burglary, which was executed with the help of four ?muscle? men from the Bronx.

Police say the four men followed the couple from their Bronx jewelry store and forced their way into the Schwartzes? home on Union Avenue.

"They beat Mr. Schwartz with their fists and slammed Mrs. Schwartz's head into the car," says Harrison Police Chief David Hall.

When the Schwartzes mentioned that their son could be on the way, the robbers took off in the couple?s Mercedes, carrying jewelry and cash. The alleged perpetrators later crashed into the entrance of Hutchinson River Parkway and escaped on foot. However, images from a security camera at the house and at a Manhattan pawn shop helped police identify the suspects, leading to their arrests.

"With modern technology and with old fashioned work [of] hitting the streets, we were able to apprehend the suspects yesterday," Hall says.

All six men are being held at the Westchester County Jail without bail.

For more on arrests in Harrison home invasion, go to your digital cable box and select iO Extra, Channel 612.

Click here for more on September home invasions