Six were arrested at Jelapang, Ipoh police station while five more were nabbed near Jalan Templer in Selangor, as police mounted roadblocks to stop the convoy to promote an upcoming anti-racism rally.
In Perak, police were said to be "very harsh" towards HRP members during the arrest.
“The police raised their fists and threatened to hit (the HRP members),” an eyewitness said when contacted.
The six in Perak who were detained - Perak HRP chief P Ramesh, his deputy N Subramaniam and four other Perak HRP members - were charged with obstructing police on duty.
There were similar convoys in Johor, Negri Sembilan and Kedah.
According to HRP information chief S Jayathas, who was contacted moments before he was arrested along with Selangor party chief K Selvam and three others, police also mounted a roadblock in Rawang.
“They only stopped our cars, not other road users. We staged a small protest and they let us pass.
Around 3pm, HRP activists in a convoy of three cars were taken into custody by police officers just after they alighted from their vehicles in Bangsar Utama, Kuala Lumpur.
Twenty activists had just arrived from Brickfields when police officers stopped them and took them into custody. They are currently in the Travers police station.
“As we know, Brickfields is a very busy area,” he told reporters at the station today.
He added that the 21 detainees will have their statements recorded and will be investigated under Section 27 of the Penal Code.
“We hope to release them under police bail by today,” he said.
Also confiscated were 55 posters, ten flags and 200 leaflets.
“We will also return their cars when we release them,” he said.
There are reports, meanwhile, that arrests have also been made in Kedah, Negeri Sembilan and Johor.
This includes 26 HRP activists who were arrested in Seremban and brought to the district police station there. Negeri Sembilan HRP chief S Sivakumar was among those held by the police.
Perkasa demonstration undisturbed
HRP had yesterday expressed its fears of a crackdown after Perak police warned them not to proceed with the convoy.
Those detained at the Travers police station were released under police bail at about 9pm.
HRP officials informed Malaysiakini that those arrested in Seremban will be staying the night in the lock-up as they refused to remove their HRP T-shirts when instructed.
HRP officials informed Malaysiakini that those arrested in Seremban will be staying the night in the lock-up as they refused to remove their HRP T-shirts when instructed.
In a text message, pro-tem HRP secretary-general P Uthyakumar asked why members of Malay rights group Perkasa were not arrested when they held a demonstration in Seremban Square today.
When contacted, Perkasa Youth information chief Nurul Izham Anuar confirmed that its members had a protest gathering at the venue today.
He could not, however, offer any more details of the event.