A person feeds birds at the Gateway of India landmark in Mumbai, India, on Saturday. The sole gunman captured in last month’s terrorist attacks on Mumbai has written to Pakistani officials to ask for legal help after Indian lawyers refused to take his criminal case, police said.

Mumbai, India ? The gunman captured in last month’s Mumbai attacks had originally intended to seize hostages and outline demands in a series of dramatic calls to the media, according to his confession obtained Saturday by The Associated Press.

Mohammed Ajmal Kasab said he and his partner, who massacred dozens of people in the city’s main train station, had planned a rooftop standoff, but abandoned the plans because they couldn’t find a suitable building, the statement to police says.

Kasab’s seven-page confession, given to police over repeated interrogations, offers chilling new details of the three-day rampage through India’s commercial center that left 164 people plus nine gunmen dead.

He said the assault, which started Nov. 26, was initially set for Sept. 27, though he doesn’t explain why it was delayed. The gunmen had been told by their handlers to carry out the attacks during rush hours when the station is teeming with commuters.

After reaching Mumbai, Kasab and his partner, Ismail Khan, the group’s ringleader, headed to the train station by taxi.

“Ismail and myself went to the common toilet, took out the weapons from our sacks, loaded them, came out of toilet and started firing indiscriminately toward the passengers,” Kasab told police.

As a police officer opened fire, the two militants retaliated with grenades before entering another part of the station and randomly shooting more commuters.

The men then searched for a building with a rooftop where they had been told to hold hostages and call a contact named Chacha, whom Kasab identified as Zaki-ur-Rehman Lakhvi, the suspected mastermind behind the attacks.

Chacha, which means “uncle” in Hindi, would supply phone numbers for media outlets and specify what demands the two should make.

Taking heavy fire from police, the two had trouble finding a “suitable building” and stormed a hospital they mistook for an apartment building. There, they searched for hostages and traded more gunfire with security forces. It’s unclear if they ever held hostages.

When they left, a police van pulled up and the two tried to take shelter behind a bush during the shootout. Kasab was hit in the hand as Khan returned fire.

“They got injured and the firing from their side stopped,” he said.

Police have confirmed the van was carrying top police officials, including the head of the anti-terror squad who was killed.

In the confession, Kasab, 21, describes his conversion from an aspiring street criminal to a loyal soldier for Lashkar-e-Taiba, the terrorist group banned by Pakistan in 2002 and blamed by India in the attacks.

He came to the organization last year while looking to buy guns to commit robberies after quitting a low-paying job at a catering business. The search led him to several Lashkar “stalls” at a bazaar in the Pakistani city of Rawalpindi, he said.

Kasab went on to receive rigorous training in weapons handling and other skills, attending at least six Lashkar camps and visiting his parents twice during breaks, he said. Lashkar operatives even lectured recruits on India security and intelligence agencies, and taught them how to evade pursuing security forces.

He said they were shown “clippings highlighting the atrocities on Muslims in India,” images of Mumbai locations on Google Earth, and film footage of the train station.

“We were instructed to carry out the firing at rush hour in the morning between 7 to 11 hours and between 7 and 11 hours in the evening,” he said. The attacks ultimately started around 9:30 p.m.