Petaling Jaya district police chief ACP Mohd Zani Che Din said the arrests were made at 3am today.
“The two suspects will be remanded for seven days beginning today for further investigations,” he said when contacted by FMT.
He said police were checking on the motive of the duo.
According to news reports, the Molotov cocktail was thrown into the surau when about 20 people were attending their Subuh prayers.
The incident was only noticed at 6.15am when one of the 20 at the Jemaah Surau Al-Huda saw burnt marks on the door of the surau.
The bottle was believed to have been filled with kerosene and was said to have not broken on impact.
Nobody was injured.
A news report said two men were seen outside the surau during the incident.
Police are investigating the case under Section 435 of the Penal Code for mischief by fire or explosive substance.
Molotov cocktail thrown into surau compound in Damansara Damai