Initial findings show that at least six people were killed and 11 more were wounded in Tuesday morning's blasts near a school in the west of Kabul, said Khalid Zadran, a spokesman for Kabul security department.

Eyewitnesses said the first blast happened near Mumtaz Tuition Center and was followed by two back-to-back explosions close to Abdul Raheem Shaheed High School in the same area.

The Ministry of Interior confirmed the blasts near Abdul Raheem Shaheed High School, saying an investigation has started into the incident and details will be shared later.

The blasts in front of Abdul Rahim Shaheed High School happened while the students were leaving their classes, eyewitnesses said.

No group has so far claimed responsibility for the blasts.

The Emergency Hospital in Kabul that is treating the wounded said in a tweet that they received seven injured children so far.