The Tories are to back the government's controversial anti-terror plans in a Commons vote, the BBC has learned.
Police want greater powers to detain terror suspects
Conservative officials say they will support the Terrorism Bill in principle at its second reading on Wednesday.
But the party will continue to oppose parts of the bill, which includes holding terror suspect for up to 90 days without charge, at a later stage.
The Liberal Democrats, who share some of the Tories' concerns, have decided to vote against the bill.
The Conservatives and Liberal Democrats had previously been united in their opposition to certain aspects of the plans.