Police had already arrested 400-500 political opponents and opposition lawyers by Sunday as a "preventive" measure.
Ishtiaq Ahmad, a Pakistani analyst, told Al Jazeera on Monday that even though scores of opposition members had been placed under house arrest for resisting emergency rule, one main opposition member had not.
Benazir Bhutto, the former prime minister, who returned to Pakistan after eight years in exile, was not among the detained, he said.
"Although she has publicly opposed the imposition of emergency, equating it with martial law, she has not been arrested or put under house arrest.
"This proves that the government has some kind of a soft corner for her."
Bhutto is expected to travel on Monday to Islamabad, where she says she will seek talks with other opposition leaders on how to counter Musharraf's move.
Most judges, including Iftikhar Chaudhry, the supreme court chief justice, have been fired since the imposition of emergency rule on Saturday.
He has been replaced by a Musharraf loyalist.
Elections in balance
Shaukat Aziz, the prime minister, said on Sunday that Pakistan was committed to holding elections, but he could not say when.
He noted that under the terms of an emergency, parliament's term, due to expire this month, could be extended for a year.
The same day, Malik Mohammed Qayyum, the attorney-general, said that a new panel of supreme court judges would rule "as early as possible" on Musharraf's eligibility for a new five-year presidential term.
Jamaat supporters staged protests against
Musharraf in Islamabad on Monday [AFP]
He also said Musharraf remained committed to his pledge to give up his uniform and restore civilian rule before he is sworn in again as president.
Condoleezza Rice, the US secretary-of-state voiced disappointment on Sunday with Musharraf's decision to implement emergency rule.
"The United States has never put all of its chips on Musharraf," she said.
But Rice said she did not expect the US "to ignore or set aside our concerns about terrorism".
Pakistan's security situation has deteriorated since July, when armed fighters stormed the Red Mosque in Islamabad to crush a Taliban-style movement.
Since then nearly 800 people have been killed in violence, which has included more than 23 suicide attacks.