LAGOS, Dec 12 (Reuters) - Nigeria has arrested two Chinese and two locals for running a fake visa office in the commercial capital Lagos, police said on Monday.

UNITED NATIONS (Reuters) - The United Nations Security Council will meet on Monday to discuss the refusal by Gambia's ruling President Yahya Jammeh to step down, diplomats said, a move the 15-member body condemned in a statement on Saturday.

DAKAR (Reuters) - West African heads of state from Liberia, Nigeria, Sierra Leone and Ghana will travel to Gambia on Tuesday to tell Yahya Jammeh to accept his defeat in this month's presidential election and "leave power", Senegal said on Monday.

DAKAR, Dec 12 (Reuters) - West African heads of state from Liberia, Nigeria, Sierra Leone and Ghana will travel to Gambia on Tuesday to tell Yahya Jammeh to accept his defeat in this month's presidential election and "leave power", Senegal said on Monday. (Reporting by Diadie Ba; Writing by Ed Cropley; Editing by Stella Mapenzauswa)

ABUJA (Reuters) - Nigerian President Muhammadu Buhari will travel to Gambia on Tuesday as part of a high-level delegation trying to get Yahya Jammeh, Gambia's leader of the last 22 years, to accept his defeat in this month's election, a Nigerian government source said.

BRUSSELS (Reuters) - The European Union imposed sanctions on seven Congolese officials it says illegally suppressed anti-government protests in September, when dozens of demonstrators were killed, and warned it would target more senior figures if violence persists.

CAIRO (Reuters) - Egyptian President Abdel Fattah al-Sisi said on Monday a suicide bomber carried out the attack that killed 24 people at Cairo's Coptic cathedral, the deadliest on the Christian minority in years.

NAIROBI (Reuters) - Kenya's President Uhuru Kenyatta said on Monday the country will have to think seriously about its membership in the International Criminal Court (ICC), signalling another African country may quit the embattled court.

BANJUL (Reuters) - Liberia's President Ellen Johnson Sirleaf will lead a delegation on Tuesday to mediate in Gambia, and representing the United Nations, African Union and West African regional bloc ECOWAS, Gambia's president-elect Adama Barrow said.

BANJUL (Reuters) - The opposition coalition of Gambian president-elect Adama Barrow on Monday called for President Yahya Jammeh, who lost an election on Dec. 1, to step down immediately and hand over power.

BRUSSELS (Reuters) - The European Union, under an agreement published on Monday, will provide funds to Mali to help it create jobs and strengthen border management in return for the African country's aid in fighting people smugglers and accepting deportees from Europe.

CAIRO (Reuters) - Mourners packed an Egyptian church on Monday for a funeral service for 24 people killed in the bombing of Cairo's main Coptic cathedral, while angry survivors accused authorities of security lapses.

ALGIERS (Reuters) - A British-Algerian journalist had died six months after staging a hunger strike in Algiers over his detention for publishing articles seen as offensive to President Abdelaziz Bouteflika, prison authorities and his lawyer said.

CAIRO (Reuters) - A bombing at Cairo's largest Coptic cathedral killed at least 25 people and wounded 49, many of them women and children attending Sunday mass, in the deadliest attack on Egypt's Christian minority in years.

KIMANA, Kenya (Reuters) - Under the shadow of a snow-capped Mount Kilimanjaro, hundreds of Maasai boys brave the morning chill to take part in a ritual that marks their coming of age.

UYO, Nigeria (Reuters) - At least 100 people were killed by the collapse of a church in southeastern Nigeria, a resident and photojournalist who visited a morgue said on Sunday, but officials put the death toll at just 27.

The following company announcements, scheduled economic indicators, debt and currency market moves and political events may affect African markets on Monday. - - - - - - GLOBAL MARKETS Oil prices jumped to their highest levels in a year and a half on Monday after OPEC and non-OPEC producers agreed to cut oil output to ease a global glut, while the U.S. dollar extended gains before a Federal Reserve meeting this week, at which a rate hike is widely expected. WORLD OIL PR