UNITED NATIONS - UN humanitarians said on Monday a 24-truck convoy carrying life-saving assistance entered the blockaded Syrian city of Kobani, only hours before renewed fighting in the vicinity was reported.

The UN Office for the Coordination of Humanitarian Affairs (OCHA) said the convoy on Sunday delivered food, nutrition, health supplies, hygiene materials, winterization support, kitchen kits, and supplies for children to the Kurdish-majority city in Aleppo governorate.

Also included were two fuel tankers to resupply the Karakoi water station and restore water supply to Kobani and the surrounding villages.

READ MORE: Gunman kills 5, including US soldiers, in C. Syria attack

However, heavy fighting was reported early Monday in areas around Kobani, also known as Ain al-Arab. Accusations have arisen between the Kurdish-led Syrian Democratic Forces (SDF) and government-linked forces over violations of a ceasefire announced on Sunday that apparently allowed the convoy to reach Kobani.

The SDF said in a statement that forces affiliated with Damascus launched coordinated attacks from multiple directions starting around 2 am local time (0000 GMT), targeting the towns of Kharab Ashk and al-Jalabiya, west and south of Kobani.

The SDF said the attacking forces brought in military reinforcements that included tanks and armored vehicles.

The OCHA said that the Syrian government announced on Monday another corridor near the town of Sarin, also in Aleppo governorate, to allow people to flee the area.

The office said five temporary shelter facilities were established, including in northeastern Aleppo, for people choosing to relocate to Syria's second-largest city.

The OCHA said the assistance provided by UN entities for Sunday's convoy was provided by the UN Population Fund, UNICEF, the UN Refugee Agency, the World Food Programme and their partners.

READ MORE: Turkish president warns against Syria's disintegration

All roads into Kobani were closed until Sunday after government troops launched a mid-month offensive to retake control of some areas held by Kurdish forces, effectively isolating the city. Following Sunday's announcement of a 15-day ceasefire, the Syrian government opened two humanitarian corridors in Hasakah and Aleppo governorates.