The Obama administration is offering rewards of up to $20 million for information leading to the whereabouts of four top leaders of the Islamic State group.

Through its Rewards for Justice program, the State Department announced Tuesday that it would pay up to $7 million for information on Abd al-Rahman Mustafa al-Qaduli, up to $5 million each for Abu Mohammed al-Adnani and Tarkhan Tayumurazovich Batirashvili and up to $3 million for Tariq Bin-al-Tahar Bin al Falih al-'Awni al-Harzi.

According to the department, Qaduli is a senior IS official who originally joined al-Qaida's affiliate in Iraq, Adnani is an official IS spokesman, Batirashvili is a battlefield commander in northern Syria and Harzi is the group's leader for the border region between Syria and Turkey.