The accident happened in the tunnel under the railway just outside the North Station.
The MIVB's An Van Hamme says that it was a 94 that crashed into a 25. The two vehicles were heading for the Liedts Square.
Visibility was good at the time, so the matter is being investigated. The driver was among the nine people injured.
Tram services were interrupted for an hour, but have now resumed.
(The vehicle depicted was not involved in the nasty crash.)