Authorities say a couple used a dog chain and padlocks to confine the woman's 16-year-old grandson to his bed in their New York home.

State police say troopers responding to a report of an uncontrollable teenager learned that Shirley Sherwood and George Colton used a 15-foot-long dog chain and three padlocks to restrain her grandson at night and at other times in his bedroom at their home in Middlebury, midway between Rochester and Buffalo.

Both were charged Monday with unlawful imprisonment and endangering the welfare of a child.

The 50-year-old Sherwood and 56-year-old Colton were released from the Wyoming County Jail after posting bail. The town court where they were arraigned didn't have lawyer information for them.

Troopers say it isn't clear if Colton is also related to the teen.