Police have blocked opposition leader Benazir Bhutto from visiting Pakistan's deposed chief justice.
Ms Bhutto, who herself was kept under house arrest for most of Friday, tried to approach former chief justice Iftikhar Chaudhry's home, where he is being detained, but police parked two trucks on the road to block her path.
After imposing emergency rule and suspending the constitution a week ago, citing a hostile judiciary and rising militancy, General Musharraf sacked most of the Supreme Court's judges and has since replaced them with more amenable ones.
Ms Bhutto is expected to defy President Musharraf and go ahead with a pro-democracy motorcade from Lahore to Islamabad next week, after police scotched a protest by her Pakistan People's Party in the garrison town of Rawalpindi on Friday.
She is due to head to Lahore on Sunday, and has said Mr Musharraf can defuse the protest if he restores the constitution, removes his army uniform and calls elections by mid-January.
President Musharraf has said elections will be held by 15 February about a month later than they were due.
He also said he would quit as army chief and be sworn in as a civilian president once new judges appointed to the Supreme Court struck down challenges against his re-election.
Earlier, Ms Bhutto has joined a protest by journalists against emergency rule, a day after the government stopped her from holding her own rally.
She had just left talks with party officials and diplomats for the first time since the government lifted her house arrest.
Also today, three British journalists were expelled for allegedly using abusive language in describing the country and its leadership.
Meanwhile, US President George Bush, in a joint news conference with German Chancellor Angela Merkel, has stressed the dangers of al-Qaeda as much as the need for Pakistan to return to a path of democracy.
"We do share a common goal, and that is to eradicate al-Qaeda," Bush said.
"I vowed to the American people we'd keep the pressure on them (al-Qaeda). I fully understand we need cooperation to do so, and one country that we need cooperation from is Pakistan."
Bush, who spoke with Musharraf earlier this week, said they had not spoken since, said “he knows my position”.
