Police will be calling up a group of people who were involved in bringing back the ashes of former Communist Party of Malaya (CPM) leader Chin Peng to Malaysia, said Deputy Inspector-General of Police Mazlan Mansor.

"The investigation is ongoing. We are still investigating because it happened quite a long time ago, so it will take some time for us to identify (those involved)," he told a press conference on the ‘Operasi Bersepadu Khazanah’ here today.