Lawyers challenge Niger president
The lawyers say their action is to show solidarity with the Constitutional Court, which was dissolved after declaring Mr Tandja's plan illegal.
The president wants citizens to vote on 4 August to allow him to hold office for three more years.
The EU has delayed some aid to the uranium-rich country over the row.
Mamadou Tandja says the people of Niger want him to stay.
Source: BBC News, Monday, 13 July 2009:
Lawyers challenge Niger president.