Egypt's ruling military council says it will not tolerate any more strikes which disrupt the country's economy.
State television carried a statement in which the military said strikers would be "confronted".
Egypt's huge public sector has been hit by stoppages by groups including policemen and factory workers.
The army statement came at the end of a day in which millions of Egyptians had celebrated the victory of their revolution one week ago.
Cairo's Tahrir Square was again at the centre of events, with an estimated two million people gathering there to celebrate the removal of Hosni Mubarak and to pay tribute to the 365 people who died in the uprising.
The demonstration was also intended as a show of strength - a reminder to the current military rulers to keep their promise of a swift transition to democracy
By evening, the gathering had become a huge party, with music, singing, dancing, fireworks and food.
But the military statement struck a more sober tone. BBC News
