Raqqa: US-backed fighters battled on Sunday to dislodge jihadists from a key military base north of Raqqa city, the heart of the Islamic State group's Syrian territory, a monitor said.
The Syrian Democratic Forces (SDF) have entered Islamic State's bastion Raqqa from the east and west, but have struggled to capture the Division 17 military base on the northern outskirts of the city.
The SDF launched a renewed attack on Division 17 overnight with backing from the US-led coalition bombing Islamic State, the Syrian Observatory for Human Rights said.
"Blasts could be heard throughout the night because of the exchange of fire between the two sides," the monitoring group said.
Observatory head Rami Abdel Rahman said the Islamic State had "heavily fortified" the base in anticipation of a ferocious SDF assault on it.
Originally a Syrian army base, Division 17 was seized by Islamic State in 2014 as it took control of swathes of the wider Raqqa province.
After its capture by the jihadists the same year, Raqqa city emerged as a key hub for Islamic State's operations in Syria, neighbouring Iraq, and beyond.
The SDF — an Arab-Kurdish alliance formed in 2015 — spent seven months tightening the noose on Raqqa city before finally entering it this week.
It has since captured the district of Al-Meshleb in the city's east, as well as parts of the western neighbourhoods of Al-Sabahiya and Al-Romaniya.
"SDF fighters are still combing through Al-Meshleb to use it as a base for new operations towards the north and south," Abdel Rahman told AFP.
Al-Meshleb is one of the more built-up residential neighbourhoods in the east of the city, while most other districts nearby are made up of markets and small shops.
An estimated 300,000 civilians were believed to have been living under Islamic State rule in Raqqa, including 80,000 displaced from other parts of Syria.
Thousands have fled in recent months, and the UN humanitarian office estimates about 160,000 people remain in the city.
Reports of civilian casualties among those still living inside have swelled in recent weeks.
The Observatory said on Sunday that coalition air strikes the previous day killed 24 civilians inside the city, up from an earlier toll of 13 people.
Abdel Rahman said the increased toll brought civilian deaths in coalition raids to a total of 58 since the battle for Raqqa city was launched on 6 June.
Updated Date: Jun 11, 2017 15:08 PM