SANA, Yemen — A large explosion at a warehouse in Sana, Yemen’s rebel-held capital, killed at least 13 people on Sunday, including seven children, and wounded more than 100, local medical officials said.

The Houthi rebels, who seized control of the capital in 2014 and are aligned with Iran, said the Saudi-led coalition had targeted the warehouse with an airstrike. The coalition denied carrying out any strikes in the area.

The state-run news agency in Aden, aligned with the internationally recognized government, said the rebels had stored weapons at the warehouse.

The health officials said more than 110 people were wounded in the explosion, which damaged nearby schools. The officials spoke on the condition of anonymity because they were not authorized to brief the news media.