GENEVA (Reuters) - Greenhouse gas concentrations climbed to a new record in 2019 and rose again this year despite an expected drop in emissions due to COVID-19 lockdowns, the World Meteorological Organization said on Monday, warning against complacency.

ADDIS ABABA/NAIROBI (Reuters) - Ethiopian federal forces were encircling the Tigray region's capital from around 50 km (30 miles) on Monday, the government said, after giving the Tigray People's Liberation Front (TPLF) a 72-hour surrender ultimatum.

ADDIS ABABA/NAIROBI, Nov 23 (Reuters) - Ethiopian federal forces were encircling the Tigray region's capital from around 50 km (30 miles) on Monday, the government said, after giving the Tigray People's Liberation Front (TPLF) a 72-hour surrender ultimatum.

(Reuters) - Britain's AstraZeneca said its COVID-19 vaccine could be around 90% effective without any serious side effects, while the United States and Germany said they could start inoculating their citizens by next month. [nL4N2I91B5]

ADDIS ABABA, Nov 23 (Reuters) - Ethiopian police have arrested some 796 people suspected of plotting "terrorist attacks" in the capital Addis Ababa for the Tigray People's Liberation Front (TPLF), the state-affiliated Fana broadcaster said on Monday.

BERLIN/ANKARA, Nov 23 (Reuters) - Germany accused Turkey on Monday of preventing German forces belonging to an EU military mission from fully searching a Turkish cargo ship that they suspected of taking weapons to Libya, a move Ankara said was a violation of international law.

Nov 23 (Reuters) - Britain's AstraZeneca said its COVID-19 vaccine could be around 90% effective without any serious side effects, while the United States and Germany said they could start inoculating their citizens by next month.

OUAGADOUGOU, Nov 23 (Reuters) - Incumbent Burkina Faso President Roch Kabore was leading with just three voting districts declared on Monday, the electoral commission said, a day after voting dominated by the threat of Islamist violence.

TUNIS (Reuters) - An armed group attempted to storm Libya's National Oil Corp (NOC) headquarters in Tripoli but was stopped by guards, the company said on Monday, underscoring the security risks that the North African nation's energy industry continues to face.