Algerian forces found the bodies of 25 hostages today as they combed a desert gas plant after a deadly stand-off with Islamists, and witnesses said nine Japanese captives had been executed.
Citing security sources, Anis Rahmani of private television channel Ennahar told AFP the army discovered "the bodies of 25 hostages" as they secured the sprawling In Amenas Sahara site.
Communications Minister Mohamed Said earlier told a radio station: "I fear that it (the toll) may be revised upward," after at least 23 foreigners and Algerians, mostly hostages, were killed since Wednesday.
It was not immediately clear if the 23 were included in today's 25 toll.
"In all nine Japanese were killed," one Algerian witness identified as Brahim said a day after special forces swooped on the gas plant run by Britain's BP, Norway's Statoil and Sonatrach of Algeria to end the siege.
The first three were killed as they tried to escape from a bus taking them to the airport as the militant attack unfolded, witnesses said.
"We were all afraid when we heard bursts of gunfire at 5:30 am (0430 GMT) on Wednesday, after we realised that they had just killed our Japanese colleagues who tried to flee from the bus," said Riad, who works for Japan's JGC Corp engineering firm.
The gunmen then took the others to the residential compound, where they had seized hundreds of hostages, he said.
"A terrorist shouted 'open the door!' with a strong north American accent, and opened fire. Two other Japanese died then and we found four other Japanese bodies" in the compound, he added, choking with emotion.
In Tokyo, a foreign ministry official said: "We are in a position not to comment on this kind of information at all.
Governments scrambled to track down their missing citizens as more details emerged of the deadly showdown after Islamists of the "Signatories in Blood" group raided the plant, demanding an end to French military intervention in Mali.
"Tragically, we now know that three British nationals have been killed, and a further three are believed to be dead. And also a further British resident is also believed to be dead," said British Prime Minister David Cameron.
Norway's Statoil said the situation remains "unresolved" for five of its employees.
"We will, and we must, keep hoping for more positive news from Algeria. However, we must be prepared to deal with bad news in the next few days," said Statoil chief executive Helge Lund.
A company statement said searches were underway inside the In Amenas complex, in the surrounding desert area, hospitals, In Amenas itself "and other villages and towns where it is possible that people could have been transported."
Thirty-two kidnappers were also killed in the 72-hour stand-off, and the army freed 685 Algerian workers and 107 foreigners, said Algeria's interior ministry.
Relatives of Kenneth Whiteside, 59, from Glenrothes in Scotland, were "devastated" after hearing an Algerian co-worker claimed to have seen him being shot but dying bravely with a smile, Britain's Mail on Sunday reported.
And the mother of survivor Stephen McFaul, 36, from Belfast, told the Sunday Mirror her son will "have nightmares for the rest of his life after the things he saw."
A security official told AFP it was believed seven foreigners were executed "in retaliation" on Saturday during the final assault that state television said also killed 11 militants.