Umno vice-president Hishammuddin Hussein has dismissed suggestions that former prime minister Dr Mahathir Mohamad's played a role in BN's lower majority during the Rompin polls.

"I don't think he has anything to do with this," he told reporters at the vote tallying centre in Kuala Rompin.

BN's majority was slashed from 15,114 in 2013 to just 8,895 amidst a lower voter turnout, while the number of votes for PAS was virtually at status quo.

On whether BN's result in Rompin would led credence to Mahathir's criticisms against Prime Minister Najib Abdul Razak, Hishammuddin again brushed it off.

"This does not involve him. He did not even vote here," he said.

Since April 2, Mahathir have been constantly criticising Prime Minister Najib Abdul Razak's leadership and claimed that BN would be routed in the next general election if he remains in power.

Mahathir said Najib was bogged down by too many controversies, namely the 1Malaysia Development Bhd (1MDB) alleged irregularities, the Altantuya Shaariibuu murder and his family's alleged lavish lifestyle.

Recently, Mahathir cited the example of how rumours were circulating that the flower arrangement for the wedding reception of Najib's daughter cost RM3 million.

The premier has not responded to this, but his officer claimed that the cost of the wedding reception was fully borne by his son-in-law .

Mahathir had also opined that the goods and services tax, introduced by Najib's administration on April 1, should be scrapped .