ERBIL, Kurdistan Region — An explosion in the rebel-controlled city of Afrin in northwest Syria on Tuesday killed 42 people and wounded at least 50 others, local officials tell Rudaw English.

Witnesses told Rudaw English that the attack took place just before four p.m. on a crowded street in Afrin's city center, near the entrance to its main market referred to by locals as the Political Junction, when fully loaded fuel tanker detonated in the middle of midday traffic.

"The bodies have been charred beyond recognition, but they appear to be civilians who were just passing by," Azad Othman, a member of the Afrin Local Council, told Rudaw English.

Shops and vehicles burned for nearly an hour as fire and rescue vehicles rushed to the scene from nearby Azaz to assist in put out flames caused by the blast.

“It was a popular market that was targeted, so most of the dead are civilians, Raed Saleh, director of the Syrian Civil Defense told Rudaw English via telephone. "Our teams are still searching and rescuing. There could be more,” he added.

US Secretary of State Mike Pompeo took to Twitter to condemn the bombing.

"The United States renews its call for support and implementation of a nationwide ceasefire in Syria following today's cowardly act of terror carried out on innocent victims in Afrin. Such acts of evil are unacceptable from any side in this conflict," he wrote.

No group has claimed responsibility for the blast, but the Turkish defense ministry has accused the Kurdish People’s Protection Units (YPG), which were ousted from the region by Turkey and its proxy Syrian rebel factions in March 2018. Since then, there has been a series of attacks on Turkish targets in the area, as well as reports of violations by local human rights monitors.

Similar blasts in areas controlled by Turkey-backed rebel fighters have targeted the area in recent months.

A statement by the YPG-affiliated Afrin Liberation Forces claimed to have killed two Turkish soldiers and three Syrian fighters in two separate attacks earlier this week.

"There have been three explosions targeting the city just this month, but this one is definitely the biggest and most deadly," Afrin resident Milad al-Shehabi told Rudaw English.

Originally from Aleppo, Shehabi was displaced to Afrin two years ago. Recent fighting has displaced more that one million Syrians from rural Aleppo and Idlib, some of which still lies outside of the control of forces loyal to Bashar Assad.

Turkey supports the Syrian opposition in the war against President Bashar Assad but has joined with Russia to secure and monitor local ceasefires.

By evening, local authorities had compiled a list of names for relatives searching to check on their missing loved ones and collect their disfigured remains.

Updated at 8.51am on 29/4/2020

Reporting by Zhelwan Z. Wali and Shawn Carrié, editing by Robert Edwards