HORRIFYING screams for help were heard as a missing schoolgirl fell into the River Thames.

The 11-year-old vanished into the water while paddling with a friend near Woolwich, London, on Monday afternoon.

Rescue boat on the Thames River.RNLI rescuers were seen searching the Thames for the missing schoolgirl on Monday Illustration of a map showing the search area for an 11-year-old girl in the River Thames near Woolwich, London.

A witness has described how they heard the pal “shouting, screaming” during the incident