BROOKLYN - Police are investigating a potential "knockout" attack that took place yesterday near Borough Park.

Authorities say a 20-year-old woman was walking down McDonald Avenue when a man walked past her, then hit her in the head from behind, knocking her down.

Police urge anyone with information to contact them.

The Flatbush Jewish Community Coalition has announced that it is offering a reward of up to $5,500 to anyone with information leading to the arrest and conviction of the perpetrators behind the "knockout game," a spate of attacks that have been reported lately.