The American Civil Liberties Union has filed a lawsuit against US President Barack Obama, demanding legal basis for America’s deadly drone attacks overseas.

The lawsuit requests essential information on the fatalities of drone strikes and other information essential for judging the legality of using armed drones to carry out targeted killings, the United Press International (UPI) reported.

“The public has a right to know whether the targeted killings being carried out in its name are consistent with international law and with the country’s interests and values,” UPI quoted Jonathan Manes, a legal fellow with the ACLU National Security Project as saying.

“The Obama administration should disclose basic information about the program, including its legal basis and limits, and the civilian casualty toll thus far,” he added.

ACLU is specifically seeking legal information that justify the ‘targeted killings’ of people by the US’s remote-controlled aerial weapons program and unmanned Predator drones.

US drone attacks have so far claimed many civilian lives in Afghanistan and Pakistan.