A strike by Air France pilots will mean more disruption on Monday, its fourth and last day, the airline warned, with many flights cancelled.

It said Sunday that between 65 and 70 percent of its long-haul flights should be in service and about half its other services.

`As far as regional partner companies are concerned, like on Sunday, 90 percent of flights will operate,` the company said.

The chief pilots` union (SNPL) called the strike Friday and it is due to continue until midnight (2300 GMT) on Monday, a day that is traditionally a busy one for the airline.

Air France puts the cost of the strike at about 100 million euros (126 million dollars).

The strike was called after the lower house of parliament adopted an amendment, which has not yet been approved by the senate, putting up the retirement age for pilots from 60 to 65 from January 1, 2010.

On Friday the government modified the proposals to allow retirement at 60 if so wished and some union leaders thought the concession would be enough to have the strike called off. But the rank and file refused.

Railway staff are due to take action on Tuesday and possibly again on Sunday in protest against proposed changes to working hours.

On Thursday it will be the turn of teachers to demonstrate against working conditions and job cuts, joined by high school and university students.

On Saturday post office staff will march to express opposition to the privatisation of the Post Office.