A major criminal investigation into alleged corruption by the arms company BAE Systems and its executives was stopped in its tracks yesterday when the prime minister claimed it would endanger Britain's security. The remarkable intervention was announced by the attorney general, Lord Goldsmith, who took the decision to end the Serious Fraud Office [SFO] inquiry into alleged bribes paid by the company to Saudi officials. BAE and the Saudi embassy had frantically lobbied the government for the long-running investigation to be discontinued, with the company insisting it was poised to lose another lucrative Saudi contract. This came at a time when the SFO appeared to have made a significant breakthrough, with investigators on the brink of accessing key Swiss bank accounts. Lord Goldsmith consulted the prime minister, the defence secretary, foreign secretary, and the intelligence services, and they decided that the wider public interest" "outweighed the need to maintain the rule of law". The decision was condemned last night as naked political interference in a criminal case. The Liberal Democrat chief of staff said the government had succumbed to Saudi pressure. The UK made overseas bribery illegal in 2002, under US pressure. No prosecutions have taken place under the new law. Clare Short, Mr Blair's former cabinet colleague, said: "The message it sends to corrupt businessmen is carry on - the government will support you."