1 teacher dead, 14 schoolchildren injured after car plows into crowd, police say

The alleged driver -- a 29-year-old German-Armenian man living in Berlin

U.S. officials have been told that German authorities are actively trying

A teacher was killed and 14 schoolchildren were injured when a car

has "suspected psychological problems" and was detained at the scene, police said.

Hesse school class to Berlin has ended in a nightmare. Our thoughts are with

The students and their teacher were there on a class field trip

The alleged driver -- a 29-year-old German-Armenian man living in Berlin