(Updates with background, more details, previous Moscow) ALGIERS, March 4 (Reuters) - Three Algerians and a Russian were killed in a roadside attack on a bus carrying workers for a Russian gas pipeline construction company, the Russian Foreign Ministry said on Sunday. The bus was travelling 130 km (80 miles) south-west of the Algerian capital, Algiers, with 21 workers from Stroitransgas, which is building a natural gas pipeline there, it said. It said the attack included two roadside blasts but gave no details on how they were carried out late on Saturday. Several Russians and Ukrainians were wounded and taken to hospital, it said. Algerian government officials were unavailable for comment but leading Arabic-language daily al Khabar said the attack was near Kaadat Souane village. It was the second bomb attack on foreign oil and gas workers since December, when an Islamist group claimed responsibility for bombing a bus carrying oil workers near Algiers. The Salafist Group for Preaching and Combat (GSPC) on Dec.12 vowed to carry out more attacks on foreigners and warned Muslims to stay away from the "interests of the infidels to avoid harm". GSPC, renamed the Al Qaeda Organisation in Islamic Maghreb, claimed responsibility for seven deadly bomb attacks on Feb. 13 in two neighbouring provinces east of Algiers.
