A wallet-snatcher was severely injured late Friday while attempting to evade capture by descending four metres from a pedestrian bridge just outside Sukhumvit Soi 2.

Police received a report around 11.30pm that a Myanmar man aged between 35 and 40 had stolen the wallet of an Indian tourist in Soi Nana in Bangkok.

According to witness reports, the suspect managed to run up the steps to the footbridge at Soi 2 but ended up cornered as his victim followed, and he was unable to enter a closed department store at the end of the walkway.

Bystanders said the suspect then attempted to climb down from the footbridge but fell face-first onto a metal barrier.

The nearly four-metre fall resulted in the man sustaining serious injuries, requiring him to be taken to Police General Hospital.

He will be questioned once he is released from hospital.