According to CNN news l, the Sherrif told  reporters that the man had been trying to buy a ticket to the concert featuring the rapper Sunday at the Del Mar Fairgrounds in San Diego, the department said in a statement.
He approached a ticket window and was told no more tickets were available, “An argument ensued at the gate and nearby deputies responded. The man pulled out a silver plated semi-automatic handgun and fired several shots into a crowded area. Deputies engaged and returned fire,” the statement said.