More than 100 people have been injured in Bangladesh's capital Dhaka as police fired rubber bullets at demonstrators protesting the transport sector, widely seen as corrupt and risky.
A Bangladeshi child holds a placard, as she participates with protesting students in Dhaka.
However, hospital staff said dozens of people had been injured, some seriously.
Bangladesh has witnessed massive student protests over the past several days, after two teenagers were killed by a speeding bus in the capital Dhaka on July 29.
Students have stopped thousands of vehicles - including those of top officials and judges - demanding to see if the cars were registered and the drivers licensed.
Protesters say that the protests were peaceful when suddenly the police used tear gas.
Photos and images of the attacks on students by the governing party activists are spreading on the social media, instigating new anger.
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Students runs back during clashes with unidentified miscreants while protesting over recent traffic accidents that killed a boy and a girl, in Dhaka, Bangladesh, August 4, 2018. He said he would comment further on the situation later Sunday.
Footage of the attack on social media showed him surrounded and beaten by almost a dozen men in the city's Dhanmondi neighbourhood.
Teenagers as young as 13 were seen on Dhaka's notoriously clogged roads checking whether cars and buses had valid licences and were in a roadworthy condition.
Law Minister Anisul Huq told a separate briefing that if police investigations found drivers to have deliberately caused accidents to kill someone, they would face death penalty under the country's penal code. According to reports from local media channels, 3G and 4G services have been slowed down and suspended in some parts of the region for the past 24 hours to make it hard for students to organize protests.
"We express our appreciation to the Dhaka Metropolitan Police and security officials for their quick and professional response following the incident", the Embassy said in a statement.
Police in Bangladesh's capital fired tear gas on Monday to disperse hundreds of demonstrating students, while a prominent human rights group demanded the release of an activist arrested for criticising the government during more than a week of protests.
Detectives also detained award winning photographer Shahidul Alam, founder of Drik Picture Library, last night for interrogation over his Facebook posts on the ongoing student protest.
Police said they had not identified the attackers.