During the weekend, Somali people, Muslim people, and people throughout the world with functional empathy, began a grieving process for those most impacted by an act of terrorism in a bustling East African area. On Saturday, a bomb attack was carried out—via an explosives-packed truck—in the capital city of Mogadishu. The attack caused an estimated 300 people’s deaths, with hundreds more injured and many presumed to be burned beyond identification.

Rescue workers told The Guardian a concrete death toll may not be established because heat from the blast ensured that some people’s bodies would never be found. The publication called the attack “one of the most lethal terrorist acts anywhere in the world for many years.”

While responsibility for the act of terrorism has not yet been determined, Somali government officials believe the group al-Shabab is the source. Al-Shabab began its insurgency 10 years ago, and Somali people took to the streets in protest of the group after Saturday’s attack.

One victim’s sibling shared that the young woman died the day before graduation. She would have been a doctor. Anfa’a Abdullahi told BBC Somali Service that her sister Maryam’s death left her devastated.

“The family is so shocked, especially our father who travelled all the way from London to attend her graduation, but instead he attended her burial,” Abdullahi said. She also said she spoke with Maryam less than a half-hour before the attack.

“At that time she was in Banadir Hospital where she was working. She told me she was waiting for some files from the hospital and she promised to call back.”