As Malaysian authorities cracked down on those who belittled the demise of PAS spiritual leader Haron Din, tears flowed for those who knew him in San Francisco.

According to his daughter Dr Huda Haron, Stanford University Medical Centre's cardiologist Alan C Yeung, who treated Haron, was in tears over his death.

"He has known you for 16 years, and we are like family. His eyes welled up and droplets fell, he cried, Baba. Many times.

"He was with us in all the harrowing and anxious moments, he never left us. All the specialists who treated you treated you well," she wrote in a Facebook posting addressed to her late father.

Huda, who is a also a medical doctor, said Yeung, who is chief cardiologist at the Stanford University Medical Centre, also asked for permission to visit Haron's grave, and sought to remain in touch with the family.

"He said you were his best patient, who fought the hardest regardless of the situation," she added.

Huda also thanked other medical specialists who treated her father, including Dr Joe Hsu (Stanford University Medical Centre) and Institut Jantung Negara's Dr Amin Ariff Nuruddin Dr Robaayah Zambahari, Dr Yap and Dr Rima.

Yesterday, former journalist Sidek Kamiso was arrested over a tweet on Haron, who died on Sept 16.

Sidek allegedly said it was ironic that someone who endeavoured to cure others using supplications succumbed to his own illness in a US hospital.

DAP MP Jeff Ooi, who retweeted Sidek's posting, will present himself to the police today, after being told to surrender by inspector-general of police Khalid Abu Bakar.

Haron in 1988 founded the Darussyifa' Islamic Treatment Centre, which now has dozens of branches nationwide.

According to Darussyifa's website, the treatment administered involves supplications using verses from the Quran.

"Treatment provided at Darussyifa' should not replace treatment at hospitals or clinics...

"Patients are still advised to prioritise conventional treatment in hospitals and clinics, and only seek alternative treatment if such treatments do not succeed," Haron said in a statement on Darussyifa's website.

The website also stated that treatments are provided free, but donations are welcomed.