OPEC member countries have proposed Iran cap its oil output at 3.92 million barrels per day (bpd) under a production-limiting deal for the whole group, a source familiar with the proposal told Reuters. The figure means OPEC members may be coming nearer to a consensus on how much Iran should produce. Iran has previously sent mixed signals, saying it would accept a freeze at between 4.0 and 4.2 million bpd. The source said Tehran had yet to respond to the proposal. (Reporting by Rania El Gamal; Writing by Dmitry Zhdannikov; Editing by Dale Hudson)