DUBLIN, Ireland (AP) _ The Irish government agreed Friday to re-examine allegations that a police source may have passed information to the Irish Republican Army that led directly to six killings.

Justice Minister John O'Donoghue said no evidence had been found of a police link but that the allegations were ``of the utmost seriousness'' and warranted thorough investigation.

The killings include those of former Northern Ireland Lord Chief Justice Maurice Gibson and his wife in 1987 and four members of the Royal Ulster Constabulary, Northern Ireland's police force, in the 1990s.

``I believe even though there is no evidence to substantiate these allegations, every effort must be made to assure and reassure the public that they have been thoroughly investigated, '' O'Donoghue said.

No one has been charged in connection with any of the killings.