Authorities say a children's roller coaster derailed at a Bronx carnival, leaving seven children with minor injuries.

Firefighters say the ride ran off its tracks around 9:30 p.m. Saturday at a neighborhood carnival on Westchester and St. Theresa avenues, near Pelham Bay Park. Police say the roller coaster stood no more than three to four feet off the ground.

The seven children have been taken to a hospital. Police describe their injuries as bumps and scratches.

It's not immediately clear how many children were on the ride or who was running the carnival.