The students were chatting at a table under a tree when the branch broke off and fell.

Four of the students remained hospitalised as of press time yesterday.

Doctors at Chulalongkorn Hospital said all of the students were in stable condition but one, Jirat Sanga-areekul, did have serious injuries.

Jirat, a student at the Faculty of Commerce and Accountancy, suffered a fractured skull, broken ribs, a broken arm and lung injuries.