Updated

SAN'A, Yemen -- A Yemeni official says two Americans kidnapped by tribesmen west of the Yemeni capital have been released and are being escorted by authorities back to San'a.

Abdullah al-Sa'fani says the two -- a man and a woman -- were released Tuesday, a day after they were kidnapped along with their driver while traveling to al-Hudaydah province west of the Yemeni capital.

The three were abducted by members of the Sharda tribe who are demanding the release of a jailed tribesman.

It was not immediately clear whether the kidnappers' demand was met or any other details.

Al-Sa'fani is the district chief of the area where the two were kidnapped.