Qatar's oil minister Mohammed al-Sada said on Sunday OPEC needed more time for consultations to reach an output freeze deal.

Earlier on Sunday, oil industry sources told Reuters OPEC and non-OPEC producers failed to reach a deal to freeze oil output at talks in Doha, Qatar, but could resume discussions in June.

Sources said OPEC producers had told non-OPEC members they needed first to reach a deal within OPEC, possibly at a June meeting. After that, the Organization of the Petroleum Exporting Countries will be able to invite other producers to join.