Two blasts have hit northwest Pakistan, killing at least 11 people including a teenage boy.
The first incident took place on Monday, when a suicide bomber blew himself up outside a government school in the Shia-dominated Ibrahimzai area of Hangu district.
It has not yet been claimed by any group, but the Taliban has targeted hundreds of schools in recent years as part of a campaign against secular education in the northwest.
A local intelligence official confirmed the incident.
Hangu borders Orakzai tribal region, one of Pakistan's seven tribal districts on the Afghan border considered to be the hub of Taliban and Al-Qaeda linked fighters.
The district also has a history of sectarian violence and was declared a "sensitive region" during the month of Moharram, considered especially holy by Shia Muslims.
In a separate incident, also on Monday, at least 10 people at least were killed and another nine wounded in an explosion at the home of a tribal leader.
The blast happened in in a remote village in Khyber tribal district, close to the Afghan border in Tirah Valley, which last year saw clashes between the Pakistani military and Taliban fighters.
Pakistan is rife with sectarian violence, with Sunni groups linked to al-Qaeda and the Taliban often attacking gatherings by Shia Muslims, who constitute some 20 percent of the country's population.