2ND LD: Sumatra bomb explosion kills 2, injures 4.
(EDS: UPDATING WITH CONFIRMATION OF BOMB BEING USED)
At least two people were killed and four others, including a foreigner, injured after a high-explosive bomb exploded in a shop-house on Indonesia's Sumatra Island early Tuesday, a local police officer said.
Abdul Gafur, deputy police chief of the Tampan District in the Riau provincial town Pekanbaru, told Kyodo News the blast occurred at 3:35 a.m.
''The shop-house owner, his wife and child and a foreigner were injured, while his two housemaids were killed,'' Gafur said.
The police officer refused to identify the foreigner or his nationality.
Gafur said the cause of the explosion was high-explosive bomb containing ''royal demolition explosive'' and nitrates found at the scene. A forensic team dispatched to the scene after the blast also found a timing device.
It was not, however, immediately clear who was behind the blast.
''We are still investigating the case,'' Gafur said.
He added Pekanbaru is a base for many Muslim militants arrested for alleged involvement in a series of bombing attacks in the country in the past few years.
Many Pekanbaru militants are allegedly linked to Jemaah Islamiyah, said to be the Southeast Asia wing of international terrorist network al-Qaida.