NEW YORK (Reuters) - Global benchmark Brent crude turned positive in volatile trade on Monday as it jockeyed between downward pressure after Iran dashed hopes that OPEC would extend its production cap pact and support on fears that U.S. sanctions could dampen Iran's output.

RIYADH, April 23 (Reuters) - The administrative chief of Houthi-controlled northern Yemen was killed in a Saudi-led coalition air raid last week, Houthi-run television reported on Monday.

GENEVA, April 23 (Reuters) - Iran may be interested in joining a key nuclear treaty if the United States withdraws its threat to rip up an existing deal on Tehran's nuclear ambitions, the head of the CTBTO nuclear watchdog said on Monday.

OSLO, April 23 (Reuters) - Offshore oil services firm Subsea 7 has made an unsolicited offer worth about $2 billion for U.S. rival McDermott, potentially breaking up the U.S. company's agreed deal with onshore engineering firm Chicago Bridge & Iron (CB&I).

WASHINGTON/TORONTO (Reuters) - Western allies stepped up pressure on U.S. President Donald Trump on Monday to keep alive an international nuclear deal with Iran, with French President Emmanuel Macron due to urge him in person not to tear up the 2015 agreement.

KAFR ZIADA, Egypt/DUBAI (Reuters) - Rice farmers in Kafr Ziada village in the Nile River Delta have ignored planting restrictions aimed at conserving water for years, continuing to grow a medium-grain variety of the crop that is prized around the Arab world.

BOSTON (Reuters) - Hate crimes targeting U.S. Muslims rose 15 percent in 2017, the second year of increases, according to a study released on Monday by advocacy group the Council on American-Islamic Relations.

TORONTO, April 23 (Reuters) - Foreign ministers from the Group of Seven leading industrialized nations will create a working group to study Russia's "malign behavior" because of concerns about Moscow's actions, British Foreign Secretary Boris Johnson said on Monday.

RIYADH, April 23 (Reuters) - Yemen's armed Houthi movement fired two ballistic missiles at a Saudi Aramco facility in the southern city of Jizan on Monday, but Saudi state media said both projectiles were destroyed.