Indonesia needs to revise its anti-terrorism law in the wake of last week's deadly attack, the country's police chief said Tuesday.
Police should be able to use information from intelligence services as evidence to arrest suspects, General Badrodin Haiti said on television.
"Right now our hands are tied," he said.
Badrodin also said the law should make it illegal for Indonesians to fight in a foreign country.
"We know some people were involved in armed conflicts in other countries, but when they returned home we can't do anything," he said.
The Indonesian parliament is ready to discuss amendments to the terrorism law, its speaker Ade Komarudin said.
"I told the president that such revisions take time," he was quoted as saying by Beritasatu.com.
Police also want the right to hold terrorism suspects for a month before they are released or charged, up from seven days under the current law, Badrodin said.
Indonesian police have arrested 12 people in connection with the bomb and gun attacks that rocked the capital Jakarta Thursday and killed four attackers and four bystanders.
The Islamic State group claimed responsibility through its news agency al-Amaq, but that claim has not been verified.
Indonesia has in recent years faced a surge in extremist violence, often linked to jihadi groups, and it is estimated that hundreds of its citizens have joined the Islamic State in the Middle East.
The current anti-terrorism law was passed after the 2002 Bali bombings that killed 202 people.