The Hyderabad police on Wednesday arrested a mentally unstable man who made a hoax call about a bomb being planted in Falaknuma Palace when Prime Minister Narendra Modi, and US President Donald Trump's daughter and advisor Ivanka Trump were attending a dinner on Tuesday.

The call was made to 108-EMRI, an emergency helpline number and they alerted the police.

A police officer said they did not panic and did basic verification.

As the Prime Minister, Ivanka, the Telangana Governor and Chief Minister, several other important personalities and delegates of Global Entrepreneurship Summit (GES) were attending the dinner at the palace hotel, the city police acted cautiously.

Deputy Commissioner of Police V Satyanarayana said the man who was speaking in an incoherent manner was traced. He was identified as 60-year-old Bontha Yellaiah, a stone cutter, described as "insane" by police.

The police officer said Yellaiah, the resident of Moula Ali of Rachakonda Commissionerate at the city outskirts, was suffering from acute mental disorder. He was later sent to a mental asylum.

The DCP said that since the entire Falaknuma Palace was meticulously checked for the last 3 days and was being watched by police through 150 CC cameras, they did not panic.

While police was taking care of the security in and around the palace, the inner layers of security were manned by US security agencies and Special Protection Group (SPG).

Congress questions Modi

Meanwhile, in an unrelated development, the Congress on Wednesday accused Prime Minister Narendra Modi of violating protocol, and raised objections over the dinner that he hosted for Ivanka Trump in Hyderabad.

"The Prime Minister broke all traditions and violated protocol and hosted a dinner for Ivanka Trump in Hyderabad. When she is being taken care of more than a head of state, then praise is bound to come," said Congress spokesperson Deepender Singh Hooda.

"If the Prime Minister wanted to host her, he could have done it privately in Delhi. She could have flown in. Eager for praise and impatient for a photo opportunity, Modi reached Hyderabad to host a dinner for her...," he said, adding that India had dignity and self-respect and Trump should have met the Prime Minister in Delhi instead of him going to Hyderabad.

"Though India welcomed her, Trump was not a head of state. Therefore, the entire process raises questions," he added.