One man has been arrested and four others identified by police in connection with the gang-rape of a female photojournalist in Mumbai.
Mumbai Police Commissioner Satyapal Singh said 20 teams of officers were the pursuing four men.
"Mumbai police will do its best to collect all the evidence - clinching evidence, scientific evidence - so that a fool-proof case is made out in the court, and they get maximum punishment," Singh said.
"We will also request the government that this case be conducted in a fast-track court."
More top news
Classmates and well-wishers have been leaving flowers and messages at a tree on a housing estate in Mansfield.
MPs will pay tribute in the House of Commons to former Lib Dem leader Charles Kennedy, who was found dead at his home earlier this week.
David Cameron has faced the House of Commons for his first Prime Minister's Questions of the new Conservative government.