A goal in the first and final minute of the game saw Peterborough and Birmingham leave London Road with a point apiece this afternoon.
Peterborough striker Emile Sinclair put the hosts on the board in 30 seconds, placing the ball in the bottom corner of the goal from inside the area.
Joe Lewis was forced into action on several occasions throughout the match. The Posh keeper was able to keep the visitors out until well after 90 minutes when Gabriel Zakuani was adjudged to have handled the ball inside the area.
Blues forward Marlon King made it count from the spot to tie the score with seconds remaining to earn a point.