There have been ongoing squabbles over payment. Under the contract terms, Iran is supposed to pay RosAtom about $25 million a month. In late 2006 after months of non-payment, Iran resumed payments and assured that it would stay current. RosAtom resumed construction at Bushehr, sending 2,000 Russian workers on-site. But the money problems continue. Sergey Kirilenko, the head of RosAtom, has said that the Bushehr plant could be finished within a few months, provided that Iran pays its bills.