Indian opposition leader Rahul Gandhi criticised the central government over allegations that security forces used pellet guns during a student protest in Delhi. At a Friday press conference, Gandhi appeared alongside Sahil Lochab, a student said to have been injured by pellets, and alleged that the government was concealing the truth. He displayed injuries on Sahil’s face, hands and body to reporters.

The allegations relate to a July 20 protest over a question-paper leak, when police action reportedly involved pellet guns. Delhi Police and the central government have denied the allegation from the outset. Several injured protesters, however, have claimed medical reports showed evidence of pellet injuries. Sahil, 19, is a final-year student at Delhi University’s School of Open Learning.

Gandhi said Sahil was injured while participating in the protest carrying the national flag and has lost vision in his right eye, with uncertainty over recovery. Sahil’s mother, Jyoti, said he was admitted to the AIIMS Trauma Centre and underwent surgery on Tuesday. Gandhi called for action against those responsible, an apology from Prime Minister Narendra Modi, and Education Minister Dharmendra Pradhan’s resignation.