Violence killed at least seven people in Syria on Thursday morning after one of the bloodiest days of the 15-month revolt left nearly 150 dead, a human rights watchdog said.

Four people were killed in the Damascus suburb of Douma when troops surrounded the town, meeting fierce resistance from rebel fighters, the Syrian Observatory for Human Rights said.

Bahraini security forces are searching for three suspects believed to be planning "terror" attacks in the kingdom and harboring materials used to make explosives, media reports said on Thursday.

Bahraini security forces had "identified three suspects believed to be involved in these terror activities... for whom there is a search operation underway," public security chief Tareq Hasan told reporters in Manama late Wednesday, according to the state news agency BNA.

Yemeni forces have arrested a cell of al-Qaida operatives suspected of carrying out a suicide bombing in Sanaa in May that killed more than 100 troops, a security official was quoted as saying Thursday.

"Security forces have captured (members of) the terrorist cell behind the attack on Sabeen Square," national security chief, Ali Mohammed al-Ansi, was quoted as saying by 26 September, a daily owned and published by the ministry of defense.

A series of attacks in the Iraqi capital and to its north killed at least 14 people and wounded more than 50 others on Thursday, security and medical officials said.

A car bomb in a popular Baghdad market killed eight people and wounded 30, while another killed two people and wounded 15 in Taji, 25 kilometers (15 miles) north of the capital, the officials said.

International envoy Kofi Annan has proposed setting up a Syrian transitional authority that could include followers of President Bashar Assad and opposition members in a bid to end the country's war, diplomats said Wednesday.

Russia and the other major powers -- the United States, Britain, France and China -- back the plan, which will be discussed at a meeting of foreign ministers Annan has convened in Geneva on Saturday, they said.

A Hamas member was killed Wednesday in a suburb of the Syrian capital Damascus, a senior member of the group told Agence France Presse, adding that they suspected Israel's spy agency of being behind the attack.

The victim was Kamal Hussein Ghannaje, said the official, speaking under condition of anonymity.

Egypt's ailing former strongman Hosni Mubarak is slipping in and out of a coma and his morale has plunged after news of Mohamed Morsi's victory in the presidential polls, officials told AFP on Wednesday.

"The former president has been greatly affected by the news of Morsi's presidential victory," said one of the officials at a Cairo military where Mubarak was transferred last week.

An attack on a pro-government television near Damascus killed seven staff Wednesday, state media said, while 29 people died in other violence on the heels of the "bloodiest week" of the 15-month uprising, according to a watchdog.

Live footage broadcast by state television showed extensive damage to the studios of Al-Ikhbariya satellite channel outside the capital with several small fires still burning.

The United States on Wednesday condemned an attack on a pro-government television station in Syria which killed seven staff in the latest bloody twist of an uprising against the Damascus regime.

"We condemn all acts of violence including those targeting pro-regime elements," White House spokesman Jay Carney said, and also rebuked President Bashar al-Assad for unnecessarily killing civilians with a brutal crackdown.

The U.N. Security Council on Wednesday expressed concern that the Syria conflict could jeopardize the safety of U.N. monitors in the Golan Heights between Israel and Syria.

A 1,200 strong unarmed force, which has been in the heights since 1974, has come under fire this year from the Syrian side of the border.