PKR president-elect Anwar Ibrahim said he was open to suggestions that electoral reform group Bersih be brought in for his party's election process but added that it would be difficult to do so mid-way through the process.

"Perhaps the suggestions can be considered but it won't be easy because the (election) process has already started. It has to proceed in a clean manner with effective oversight.

"It's not easy because the process cannot be delayed from (the time frame) that the Registrar of Societies (ROS) had ordered," he said.

Anwar was responding to calls for Bersih to see the PKR election process after the first day of voting last Saturday was met with problems with the new electronic voting system.

While the system worked in Penang, the results in Kedah had to be invalidated. The PKR election committee had blamed the problems on "human error".

The party election in several states was also postponed pending rectification to the weaknesses.

However, the committee had warned that the election process must still be completed within the allotted time frame so as not to run afoul of the ROS.