The delegation is led by former Prime Minister Chaudhry Shujaat Hussain and includes several religious scholars.
Pakistani security forces set off several warning explosions near the mosque Thursday to encourage entrenched religious students to surrender. The students, who advocate strict Islamic values, have been holed up inside since shootouts Tuesday with police and troops, which left at least 24 people dead and more than 100 injured.
About 1,000 students are still inside the mosque, a hotbed of Islamic radicalism in the Pakistan capital, after about 1,200 people left the building Wednesday and several more, including two female students, surrendered later.
"We are not going to succumb to force and surrender," Abdul Rashid Ghazi said previously.
Interior Ministry troops have blocked several key roads in the city, and public transport has been brought to a halt.
The radicals inside the mosque have called for the overthrow of President Pervez Musharraf and accused him of betraying Islam to the U.S. and the West.
The government has said it will only accept the unconditional surrender of those inside the mosque.
