Ten electric scooters and electric bicycles were seized by the authorities in a two-night operation earlier this week.
Among the personal mobility devices (PMDs) seized was an electric scooter weighing slightly more than 64kg, the Land Transport Authority (LTA) said in a Facebook post on Wednesday night.
The enforcement operation against errant riders was carried out by the LTA's Active Mobility Enforcement Officers and the Traffic Police on Monday and Tuesday.
It covered the north-eastern and western parts of Singapore, and included Hougang Avenue 4, Boon Lay Way and Lakeside Road.
In total, 10 PMD and power-assisted bicycle users were caught for riding non-compliant devices, such as those that were overweight.
Their devices were seized under new laws which state that they should weigh no more than 20kg, and have a maximum width of 70cm and a motorised top speed of 25kmh.
All power-assisted bicycles must have an LTA approval seal and a valid registration plate.
New laws regulating the sale and use of bicycles, PMDs and power-assisted bicycles kicked in on May 1.
They cover offences such as the use of non-compliant devices, riding on the wrong paths, speeding and reckless riding.
If caught, offenders may face a jail term of up to six months and a $10,000 fine.
LTA said in its Facebook post that the authorities will "continue working together in routine operations to strictly enforce against errant users, as well as to prevent them from endangering other path or road users and themselves".