Rapid Action Battalion arrested Jamaat-e-Islami leader AKM Yusuf, known as the founder of the Razakar force, shortly after a tribunal issued arrest warrant against him in connection with wartime offences.
Razakar was an auxiliary group of then Pakistan army.
Yusuf is facing 15 war crimes charges, which include genocide, killing, looting, arson, religious conversion and deportation of people during the 1971 Liberation War.
Later, Yusuf was handed over to Dhanmondi police, said Sheikh Maruf Hasan, deputy commissioner of Dhaka Metropolitan Police (Ramna Division) was quoted as saying by the Daily Star.
After issuing the warrant, the tribunal ordered Yusuf to appear before it by May 26.