A senior Umno leader has alleged that Bersatu president Muhyiddin Yassin may have an ulterior motive behind his apparent willingness to rekindle strained ties with former premier Dr Mahathir Mohamad.

Umno supreme council member Mohd Puad Zarkashi said since Bersatu's funds remain frozen amid an MACC probe, Perikatan Nasional may require a "mega donation" for the upcoming six state election campaigns.