FORT WORTH -- One person is in critical condition and 12 others have minor injuries after a school bus was involved in an accident in Fort Worth Friday morning.

The incident happened on eastbound State Highway 121 near Sylvania Drive just before 7 a.m., according to MedStar.

The Fort Worth Fire Department says the school bus was involved in an accident with a car.

One person was trapped inside the car and had to be rescued. He or she was taken to John Peter Smith Hospital and is in critical condition.

<p>School bus crash in Fort Worth</p>

There were 11 students on Fort Worth Independent School District Bus 788, plus the driver. Another school bus came and picked up the students just before 8 a.m.

The cause of the crash is under investigation.

WFAA has a crew heading to the scene.

Check back for more as this story develops.