WINSLOW TWP. -- Police said they have caught two teens who have been hurling large rocks at cars on the Atlantic City Expressway, causing damage and injuring two people, for more than six weeks.

The boy and girl, both 14, were caught Friday with a bucket full of rocks near where Kali Drive dead-ends at the expressway, according to a statement from Winslow police.

The investigation began July 9, when police received the first report of a vehicle being hit with a rock on the westbound side of the highway in the area of mileposts 40 and 41, police said.

Over the following weeks, until Aug. 23, nine more vehicles were hit with large rocks in that same area, also heading west.

"All vehicles sustained smashed windshields and two victims sustained minor injuries," Winslow police said.

New Jersey State Police and township police conducted surveillance, canvassed the neighborhood, interviewed victims and witnesses in their investigation.

They determined that the end of Kali Drive, which is separated from the expressway by a guardrail and about 40 feet, was the most likely spot from which the rocks were being thrown.

The teens were identified after surveillance cameras in the area captured footage of them Aug. 22, police said.

Three days later, two witnesses saw the pair in the area of the expressway "gathering rocks in a bucket," police said.

Each teen was arrested and charged with two counts of aggravated assault, 10 counts of criminal mischief, nine counts of interference with transportation, nine counts of weapons possession and nine counts of possession of a weapon for an unlawful purpose.

They were placed in the Camden County Juvenile Detention Center in Blackwood, police said.

Rebecca Everett may be reached at reverett@njadvancemedia.com. Follow her on Twitter @rebeccajeverett. Find NJ.com on Facebook.