YORK — Three motor vehicle accidents within 20 minutes of each other slowed the already heavy northbound traffic on the Maine Turnpike Friday afternoon and sent at least one person to the hospital.

According to state police, a three-car collision occurred around mile marker 6 in York just before 3 p.m., with an “elderly” woman sustaining minor injuries and being taken to York Hospital. Police did not have the name of the woman Friday night.

Ten minutes later there was another accident involving “two or more vehicles” at mile maker 5, and 10 minutes after that there was a two-car collision at mile marker 3.

The other two accidents did not involve personal injuries, state police said.

Because of the three accidents, traffic was backed up to the New Hampshire border.