A bomb killed on Thursday morning three children in al-Qatan area of Hadramout governorate, local sources affirmed, pointing out that al-Qaeda militants might plant the bomb in a main road of al-Qatan.

The sources reiterated that the three children are sons of security officers and they were killed while they were going to receive foodstuffs allotted to their fathers.

Yemen witnesses a state of loose security in Sana'a and other cities as bombings frequently target Yemeni officials and civilians in major cities of the state.

Gunmen killed on Monday General Abdullah al-Ashwal, a colonel in the Political Security Office in the heart of the capital Sana'a.

A series of assassinations were carried out against high-ranking officials of the Political Security in the few past months.

Meanwhile, three Yemeni soldiers of the Central Security were killed and several others were wounded in a blast that targeted a commander of the Central Security in Al-Mukala of Hadhramout governorate last week.

Security officials said that the authorities foiled many plans to carry out terrorist attacks by al-Qaeda in the capital Sana'a, affirming that seized 40 belts packed with explosives.

In earlier September, a violent explosion rocked the neighborhood of the Cabinet located in the heart of the capital Sana'a, leaving about ten soldiers and civilians killed and more others were wounded.

In the mid of August, armed men attacked the Political Security's building in Aden, killing about 20 soldiers and wounding dozens more.

After the Yemeni government announced its victory in early June, the al-Qaida carried out a suicide bombing various governorates and killed the commander of the Yemen southern military region, Salem Qatan.