Police have deployed in the Senegalese capital, Dakar, ahead of a vote on a controversial anti-terrorism law that the opposition fears would be used to ban protests and criminalise dissent.
The Movement for the Defence of Democracy - an opposition coalition - has urged people to take to the streets.
The government says the bill is meant to strengthen Senegal's fight against terror groups.
The vote comes amid uncertainty over whether President Macky Sall will seek a controversial third term.
On Thursday thousands took to the streets of Dakar to voice their opposition to the proposal.
Some Senegalese suggest the anti-terror legislation has been introduced in order to suppress opposition to a third term for the president.