''If somebody wants to precipitate a crisis, we might have to withdraw support from the Government even before the Prime Minister returns from Japan,'' CPI General Secretary A B Bardhan told a press conference when asked to comment on rejection of the deadline by Congress spokesman Manu Singhvi yesterday.

Left parties have said they would withdraw support the moment the Government went ahead with operationalising the nuke deal.

On reports that Singhvi had described the setting of the deadline as 'discourteous,' he said, ''we did not want to pull the rug from the Government. Who is teaching us courtesy? We don't want lessons in courtesy from Congress.''

He said it was decided in the last Left-UPA meeting that before going to the IAEA, the Government would show the text of its proposals to the Left parties but had not done so.