Justice Helen McEntee estimates that more than 80 percent of people applying for asylum in Ireland are coming from Britain
The attack occurred in Maidan Shar city after four militants tried to enter the provincial court building but their assault was repelled by the security forces, an official told Xinhua news agency.
"One terrorist blew up his explosive vest at the front gate while three militants tried to get access to the second gate shortly after the blast," the official said, adding the attackers were disguised in army uniform.
Two policemen were killed following the blast while three militants were shot dead by the security forces before reaching the second security gate.