Veerapong, who is in charge of Ramkhamhaeng University clashes, said the exact number of injured people could not yet be established.
He said a defused M67 was found inside the campus.
He added that police trucks could not enter the campus yet because there wee vehicles blocking the road.
Veerapong said he was coordinating with the university rector to evacuate the some 2,000 stranded students.
But while he was giving interview, ten trucks of municipality police of the Bangkok Metropolitan Administration entered the university at 11 am Sunday to evacuate some 2,000 students trapped inside.
The trucks were open truck with no roof. They left the campus on Soi Ramkhamhaeng 49.
Students were also seen running out o the university and many took boat service on Saen Saeb Canal to leave the area.