The move comes less than a fortnight after Vice President Mike Pence had a meeting with Prime Minister Narendra Modi in Singapore, during which he is believed to have himself raised this issue and rued that even 10 years after the Mumbai terrorist attack its perpetrators have not been brought to justice.
Indian officials accused Pakistan's intelligence agency of working with the militant group to mastermind the attack - an allegation Islamabad denied.
"On the ten-year anniversary of the Mumbai terror attack, the USA stands with the people of India in their quest for justice".
Noting that a day earlier, the State Department had announced to offer up to USD5 million for information leading to the arrest and conviction to anyone who committed or assisted the horrific attacks, Sales said, "With this, we remind the world that we have not forgotten those who perished 10 years ago and we will not rest until the perpetrators are brought to justice".
State Department's Rewards for Justice (RFJ) programme on Monday said it is offering a reward of up to Dollars 5 million for information leading to the arrest or conviction in any country of any individual who committed, conspired to commit, or aided or abetted the execution of the 2008 Mumbai attack.
Mumbai's police force will remember the more than a dozen officers who were killed, many while fighting the militants, at a ceremony starting at 09:30 am local time.
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Pompeo also asserted that the USA will call upon Pakistan, to uphold its UN Security Council obligation to implement sanctions against the terrorists responsible for this atrocity. The attacks started on 26th November and lasted until 29th November 2008; at least 166 people died and more than 300 were wounded.
Over 60 hours, four attackers shot dead guests and hotel staff, detonated explosives and set ablaze parts of the building - including its famous dome.
"We stand with the families and friends of the victims, whose loved ones were lost in this act of barbarism, including six American citizens", he added.
The US already has a $10 million bounty offered for Saeed and $2 million for Hafiz Abdul Rahman Makki, another senior group leader.
Mohammad Ajmal Amir Kasab, the gunman caught at the railway station, was executed by India in 2012 after being found guilty of charges including murder and waging war against India.