[This post contains content that certain readers may find disturbing or offensive.]

A summer crackdown on perverts plaguing Beijing's public transportation system has taken a deadly turn after a man accused of molesting a woman on a bus ended up using a knife to slash his victim.

The incident occurred at around 8am on Monday (July 17) on the #582 bus in the east-end neighborhood of Liyuan near the terminal station of the Beijing Metro Line 1. The suspect was subdued by the bus driver and fellow passengers as the victim was seen lying on the street, covered in blood.

In a report posted online, the Tongzhou police make no mention of any molestation. However, Weibo user @新华lois said the suspect touched the victim inappropriately before attacking her.

Arrested is a 26-year-old man surnamed Liu, originally from Liaoning. Police say the investigation is ongoing.

Monday's knife attack comes in the wake of a campaign in which undercover Beijing police have arrested dozens of suspects for sexually molesting women on the city's crowded public transportation. Caijing reported that 20 suspects had been arrested as of June 16.

Some local media have taken it upon themselves to uncover some of these subway perverts, such as this video that reportedly shows one man sexually molesting four different women within a five-minute span, or catching men right in the act (shown below).

Local media have also uncovered a group of men who share their perverse acts in an online group, boasting of how they rub up against women (self-described as "顶族 dǐng zú," a phrase too gross to translate into English).

However, the campaign's sensational arrests have been met with increasing resistance. Some suspects have violently attempted to avoid being taken into custody (as seen above), while last week one undercover officer suffered a bite wound by a suspect after he was caught (link here, don't click on account of grossness).

And while Beijing has yet to follow the lead of southern Chinese cities that have adopted women-only subway trains, its trains have become so crowded that women (or men) don't have any personal space to call their own. For just one example, here's the scene outside Tiantongfan Station on Line 5, also on Monday:

It's for this reason that although Beijing is considered comparatively safe, it's always good to stay vigilant, especially when in crowded and enclosed spaces.

More stories from this author here.

Twitter: @Sinopath

Images: Taici, Weibo (1, 2, 3, 4, 5), China Xiaokang