Cairo: Egyptian police detained at least 36 members of the Muslim Brotherhood, Egypt's most powerful opposition movement, in dawn raids on Thursday, Egyptian security sources said.

The men were detained on suspicion of being members of an illegal organisation and holding organisational meetings, the sources added.

Police took the men from their homes in the Fayoum province southwest of Cairo and in the Nile Delta provinces of Menoufia and Sharkia, the sources added.

One security source said the detentions were part of a planned crackdown on the movement during preparations for municipal elections expected to take place in April.

The government calls the Brotherhood an outlawed group but members hold a fifth of the seats in parliament. The organisation operates openly within limits, although security forces often detain members without formal charges.