Shiite rebels attacked a Sunni Islamist school in northern Yemen Saturday, killing more than 20 people and wounding 70 others.
A teacher at Dar al-Hadith, a Muslim fundamentalist centre located in a suburb of the Shiite stronghold city of Saada, spoke to the AFP on condition of anonymity that the Shiite Houthis saw the school as a threat.
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Before the Houthis made the attack, they cordoned off the suburb and prevented food from being delivered to about 10,000 people for two weeks, the teacher said.
Violence continued through Sunday when the Houthis attacked Sunni Islamist Salafi fighters with gunfire in Damaj, killing 25 and wounding 48, Reuters reported.
The pro-Shiite Houthi movement in Yemen has expanded in power during the 10-month uprising to sack President Ali Abdullah Saleh from his 33-year rule, especially in the northern provinces. The yearlong conflict to eradicate the Houthi rebels has been one of several issues that sits at the forefront of the country.
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Saleh stepped down after the months of protest, becoming the fourth leader to leave office as a result of the Arab Spring unrest that has ignited much of the Middle East and North Africa this year.
Conflict has run high since Saleh signed a deal, brokered by the six-nation Gulf Cooperation Council, which allows him to step down from power in exchange for immunity.
Hundreds of people have died since January due to violent crackdowns against anti-Saleh protesters in Yemen.