Umno should not be scared of Parti Pribumi Bersatu Malaysia (Bersatu), a 'mosquito party' that is yet to be officially formed, said Bersatu pro-tem president Muhyiddin Yassin.

He said this in response to Umno secretary-general Tengku Adnan Tengku Mansor, who claimed that the party should not be allowed to use 'Bersatu' as its acronym, as the word is so common.

"Yeah, our party is so common, Umno should not be scared of this party. It is like a mosquito party, it is not even formed yet," he said after attending a blood donation campaign at a shopping mall in Kuala Lumpur.

"I don't have members yet, we don't have branches and divisions that they (Umno) have, we dont have million of members, we dont even have money. So they shouldn't be so worried about this party," he said.