Pakistan has no evidence linking the banned Jamaat-ud-Dawah chief Hafiz Mohd Saeed to the Mumbai terror attacks but was detained in the interest of "national security", a top legal official said on Friday.

Gunmen detonated a car bomb near police and intelligence agency offices in Lahore on Wednesday, killing about 30 people and wounding more than 100 in one of Pakistan's deadliest attacks this year, officials said.