Shocking footage circulating widely on social media shows a passenger snorting a suspicious white substance on a packed Dublin Bus.
The passenger can be seen taking out the powder and placing it on the screen of his phone.
The man then goes on to chop the substance up with what looks to be a plastic card of some sort.
Then, with a rolled-up bank note, he can be seen sniffing the powder.
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The incident took place on the packed 43 bus to Swords on March 20 shortly after 6pm.
The footage comes after another Dublin Bus passenger was filmed lighting up and smoking what was reported to be heroin by a witness in an unrelated incident.
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The person who took the video, which was seen by Dublin Live, told us that the passenger was carrying out the alleged act on the 39A bus on the Navan Road Way.
The incident took place on March 13 but the time is unknown.
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Regarding both events that took place, Dublin Bus told Dublin Live that they "take incidents of this nature extremely seriously".
They added: "All incidents are investigated as per company protocols. Dublin Bus doesn’t have anything further add to at this point."