The Latest developments on the war in Syria, the refugee crisis and security talks in Munich, Germany. (all times local):

10:30 a.m.

The Russian defense ministry has lashed out at the U.S.-led coalition in Syria for refusing to provide intelligence on Islamic State targets there.

Defense Ministry spokesman Maj. Gen. Igor Konashenkov said in a statement on Thursday that Russia has shared its own intelligence with the United States that it has "gratefully taken" but has not reciprocated.

Konashenkov said Russia has repeatedly asked the U.S. and its allies for intelligence in response to the accusations that Russians are targeting the "wrong objects."

A Syrian government offensive around the city of Aleppo backed by Russian airstrikes has sent tens of thousands fleeing to the Turkish border, putting peace talks in Geneva in jeopardy.

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9:45 a.m.

An opposition activist group and a rebel say Kurdish fighters and their allies have captured a military air base in northern Syria.

Abdul-Jabbar Abu Thabet, a local rebel commander in the Aleppo province, said Thursday that Mannagh air base fell to the People's Protection Units, or YPG, and their allies after fierce battles.

The Britain-based Syrian Observatory for Human Rights said the offensive came as warplanes believed to be Russian carried out 30 airstrikes in the area. It said the air base and a nearby village, also called Mannagh, fell late Wednesday.

With Syrian troops backed by Russian warplanes waging a major offensive between the northern city of Aleppo and the Turkish border, the Kurds appeared to be exploiting the chaos to expand their nearby enclave, known as Afrin.