A Pakistani government prosecutor said Monday he had been forced to delay his appeal against a court order which grants bail to the alleged mastermind of the 2008 terror attacks in Mumbai.

A judge in an Islamabad anti-terror court last week granted bail to Zaki-ur-Rehman Lakhvi, accused over the siege on India's commercial capital that left 166 people dead and was blamed on the banned Pakistani militant group Lashkar-e-Taiba (LeT).

A Pakistani government prosecutor said Friday he will challenge a court order granting bail to the alleged mastermind of the 2008 terror attacks in Mumbai, which sparked strong condemnation from India.

Zaki-ur-Rehman Lakhvi is accused of planning the 60-hour siege on India's commercial capital that left 166 people dead and was blamed on the banned Pakistani militant group Lashkar-e-Taiba (LeT).

India on Wednesday marked six years since militants stormed Mumbai in three days of horror that left 166 people dead, as survivors said they would never be "beaten back by terror".

Families of victims and politicians laid flowers and wreaths at sites around the city to remember those slain in 2008 when Islamist gunmen stalked luxury hotels, a popular cafe, a train station and a Jewish center.

India summoned a top Pakistani diplomat on Friday, two days after announcing resumption of foreign-secretary-level talks, to voice unhappiness over repeated delays in the trial of seven men accused in the deadly 2008 Mumbai attacks.

"We asked them to ensure a mechanism whereby Indian diplomats in their country get regular briefings about the Mumbai terror trial and related investigations," a foreign ministry official told AFP.

A Mumbai court convicted two teenage boys Tuesday over separate gang-rapes that shocked the city in a verdict that came days after an Indian minister said juvenile suspects should be treated as adults in rape cases.

Two 17-year-olds were found guilty -- one over the gang-rape of a photographer and another over the gang-rape of a telephone operator in the same abandoned mill compound in the city last year, public prosecutor Ujjwal Nikam told Agence France Presse.

India's new Prime Minister Narendra Modi called on his Pakistani counterpart Nawaz Sharif on Tuesday to crack down on militant groups while stressing his desire for closer economic ties, the foreign ministry said.

Modi "underlined our concerns related to terrorism" to Sharif during landmark talks in New Delhi on the first day of his term in office, said Indian foreign secretary Sujatha Singh.

Cricket-mad teenager Dhaval Lodaya was on his way to a temple when his Mumbai train derailed and he bled to death -- becoming one of the 10 people who die every day on the city's rail network.

Known as the lifeline of India's congested financial capital, the low-fare trains have become a dangerous gamble for the millions of commuters who use them daily, with 3,506 deaths recorded last year alone.

An Indian court handed down life sentences Friday to three gang-rapists who attacked a photographer and a phone operator in an abandoned mill compound in the center of Mumbai.

Mohammed Salim Ansari, Vijay Mohan Jadhav and Mohammed Kasim Hafeez Shaikh were given the sentences a day after their conviction for the attacks in July and August last year which triggered worldwide headlines and reignited anger about women's safety in India.

A Mumbai court convicted four men on Thursday over the gang-rape of a photographer on assignment in the city last year, a case that reignited nationwide anger over women's safety.

The court found the men guilty of raping the 22-year-old in August last year at an abandoned mill compound, where she had gone to take photos with a male colleague, close to an upscale area of the financial city.

An apartment block collapsed in the Indian financial hub Mumbai on Friday, killing six people and injuring three others in the latest of a series of deadly building cave-ins, authorities said.

Dozens of rescuers scoured the site in search of anyone trapped under the wreckage of the building, located in a densely populated area of the city and surrounded by other structures which were hit with debris.