Turkish air strikes targeting local armed groups in northern Iraq killed six members of Kurdish security forces in an apparent accident on Tuesday, a senior official said.

"Six people were martyred, five from the peshmerga and the sixth from asayish," Lieutenant General Jabbar Yawar, secretary general of the peshmerga ministry in Iraq's autonomous Kurdish government, told AFP.

Air strikes on a rebel-held village in northwest Syria early Tuesday killed 12 people and put a nearby field clinic out of service, a monitor said. 

Yemeni protesters reached the Red Sea city of Hodeida Tuesday, ending a weeklong march from the capital to demand the rebel-held port be declared a humanitarian zone. 

The toll in Turkish air strikes on Kurdish forces in northeast Syria on Tuesday rose to 18 killed, according to the Syrian Observatory for Human Rights.

"The dead are fighters and media officials from the People's Protection Units (YPG)," said Observatory head Rami Abdel Rahman, who had earlier reported a toll of three people killed in the dawn raids. 

International judges on Monday unsealed an arrest warrant for Libya's former security chief, accusing him of carrying out war crimes in 2011 to quash opposition to late dictator Moamer Gadhafi.

Prominent Kuwaiti opposition leader Mussallam al-Barrak called on Monday for national reconciliation to rescue the oil-rich Gulf state just days after his release from jail.

The U.S. government imposed "sweeping sanctions" on Syrian officials in response to what the U.S. says was a sarin gas attack on civilians earlier this month, the Treasury Department announced Monday.

The Treasury ordered a freeze on all assets in the United States belonging to 271 employees of the Syrian Scientific Studies and Research Center (SSRC), and blocked any American person or business from dealing with them. 

Prosecutors charged an Israeli-American teenager on Monday with making more than 2,000 threats against Jewish institutions, airlines, police stations and even a professional basketball team's plane, Israel's justice ministry said.

The Trump administration will issue new sanctions against Syria as early as Monday as part of its ongoing crackdown on the Syrian government and those who support it.

Three U.S. officials said that the sanctions are part of a broader effort to cut off funding and other support to Syria's President Bashar Assad and his government amid the country's escalating civil war. The U.S. blames Assad for a recent chemical attack on Syrian civilians, and responded earlier this month by launching missiles against a Syrian airfield.

The U.S.-backed Syrian Democratic Forces penetrated the Islamic State group's bastion of Tabqa in northern Syria on Monday, overrunning territory in the town's south, a monitor said.