3 killed in train collision in South Africa, responders say 3 killed, more than 200 injured in train collision in South Africa's capital, responders say

JOHANNESBURG -- Authorities in South Africa say a train collision in the capital has killed three people and injured more than 200.

Netcare911, an emergency responders' group, says many injuries are "minor to moderate" but that one person in critical condition was airlifted to a hospital after the accident Tuesday in Pretoria.

Authorities are investigating the cause of the collision.