Bahrain says home-made bomb wounds four policemen
Unrest has racked Bahrain for more than a year, with mainly majority Shi'ite protesters demanding more democracy and an end to what they see as discrimination in the Sunni-ruled kingdom.
"The officers were dealing with saboteurs who were terrorising citizens .. and damaging public and private property," Public Security Chief Major-General Tariq al-Hassan told the state-run Bahrain News Agency.
One policeman was critically wounded by the early morning blast in the village of Bani Jamra, west of the capital Manama, and the others suffered burns, Hassan said.
Daily protests to demand the release of Abdulhadi al-Khawaja have been taking place across the small Gulf Arab island state, which crushed mass street protests last year with the help of troops from Saudi Arabia and the United Arab Emirates.
Saudi Arabia said on Saturday that it had received requests for financial aid from Bahrain under a facility set up by Gulf Arab states during the Arab uprisings last year.
"We are now discussing (last year's aid pledge) and we have actually received some requests... from Bahrain, and we will be finalising the finance package with them," Finance Minister Ibrahim Alassaf told reporters after a meeting of finance ministers from the Gulf Cooperation Council in Riyadh.
The six-member bloc agreed last year to give $10 billion to Oman and Bahrain, two of its members that faced unrest inspired by uprisings which have toppled four Arab autocrats.
Western human rights groups say Khawaja and 13 other opposition figures in prison for their role in last year's protests are prisoners of conscience and should be freed.
Last month the Formula One grand prix returned to Bahrain despite protests. Last year it was postponed, reinstated and then cancelled due to the uprising and bloody crackdown.
Bahrain's king ratified constitutional reforms on Thursday that the government hopes will help end a year of protests, but the main opposition party denounced them as inadequate and said the struggle for democratic reforms would continue in the island state, which hosts the U.S. Fifth Fleet.
(Writing by Firouz Sedarat; Editing by Alistair Lyon)