Iran has missed a deadline to answer questions about its nuclear program, the global nuclear watchdog IAEA says, according to BBC News.

Iran had agreed to provide information to help allay concerns about a military dimension to its program, but had failed to do so, the IAEA reported.

These include suspected work on detonators which can set off nuclear bombs and high explosive charges.

It comes weeks before a deadline for Iran and world powers to reach a final deal to resolve the nuclear issue.

The U.S., EU and other powers suspect Iran is secretly seeking to develop nuclear weapons. Iran has strongly denied the charge, insisting its programme is purely for peaceful purposes.