MEXICO CITY (Reuters) - Divisions within Mexico's main conservative opposition party have erupted into a bitter public dispute that threatens to undermine the reform agenda of President Enrique Pena Nieto.

LONDON (Reuters) - British Prime Minister David Cameron's flagship gay marriage policy is set to deepen a rift in his own party on Monday with many of his own lawmakers preparing to defy him in a sign of growing strains on his leadership and his coalition government.

MAIDUGURI (Reuters) - Nigeria relaxed a curfew on Monday in parts of the northeast where its troops are mounting their biggest offensive yet against militants from the Islamist group Boko Haram.

SOFIA (Reuters) - Bulgaria's Socialists revealed a plan on Monday to speed payments to business and boost support for the poorest in a bid to win support for a technocrat government and end a political deadlock after an inconclusive election.

LONDON (Reuters) - Radical Muslim cleric Abu Qatada could be deported to Jordan to face trial on terrorism charges within weeks, a British court heard on Monday, and it ruled he should remain in jail in the meantime to prevent him from absconding.

JERUSALEM (Reuters) - Israel said on Monday it had canceled a visit by the United Nations Educational, Scientific and Cultural Organization (UNESCO) to Jerusalem's Old City, saying the Palestinians had sought to politicize a conservation mission.

AMMAN (Reuters) - About 30 Lebanese Hezbollah fighters and 20 Syrian soldiers and militiamen loyal to President Bashar al-Assad have been killed in the fiercest fighting this year in the rebel stronghold of Qusair, Syrian activists said on Monday.

(Reuters) - Yahoo Inc said it is acquiring blogging service Tumblr for $1.1 billion cash, a bold bet by Chief Executive Marissa Mayer to revitalize the struggling Internet pioneer by co-opting a Web property with strong visitor traffic but little revenue.

DUBAI (Reuters) - Iran's electoral watchdog said on Monday it would bar physically feeble candidates from running for president, in an apparent hint that it could disqualify 78-year-old former President Akbar Hashemi Rafsanjani from the race.

MAKHACHKALA, Russia (Reuters) - Two car bombs exploded in the capital of the Russian province of Dagestan on Monday, killing at least eight people and wounding about 20 others, investigators said.

AMMAN (Reuters) - About 30 fighters from the Lebanese militant group Hezbollah and 20 Syrian soldiers and militiamen loyal to President Bashar al-Assad were killed in heavy fighting with rebels in the town of Qusair, Syrian activists said on Monday.