A German train dispatcher charged with 12 counts of negligent homicide and 89 counts of causing bodily harm in the collision of two commuter trains earlier this year admitted Thursday to hitting the wrong signal buttons, news agency dpa reported.

A deadly train crash in southern Germany that killed 11 people was probably caused by human error on the part of the train dispatcher, prosecutors said Tuesday.

Two commuter trains crashed head-on Tuesday in southern Germany, killing 10 people and injuring 80 as they slammed into each other on a curve after an automatic safety braking system apparently failed, the transport minister said.