Iran's foreign minister said on Monday he was open to continuing nuclear talks with major power for as long as necessary hours before another deadline to end more than the 12-year dispute was due to expire. 'There shouldn't be any extension,' Mohammad Javad Zarif was quoted as saying by Iran's semi-official Fars news agency. 'But we can continue the talks as long as it is necessary,' he said ahead of a bilateral with his Chinese counterpart. The latest deadline is set to end at midnight on Monday.