Potentially lethal drugs were stolen from a diabetic patient in a street robbery at the weekend.

The 45-year-old victim was with friends and about to board a 243 bus from the Bunhill Row bus stop in Old Street, Finsbury, at around 8.20pm on Sunday when the two thieves on bikes dragged her to the floor and stole her handbag containing the vital medicine.

The suspects then rode off on their bikes towards Bath Street, leaving the victim with cuts and swelling to her face and arms.

Detectives are appealing for information about the incident and fear that the drugs – which included two insulin pens, citalopram antidepressants and diazepam – could prove fatal if used.

The suspects are described as two teenagers who were both wearing hooded tops.

Investigating officer, Det Con Gethin Roberts, said:” I am very concerned that if these drugs, particularly the insulin pens, get into the wrong hands they could be very dangerous and could prove fatal if ingested. The suspects may not realise what they have, and I appeal to them not to take these drugs. I am also appealing for witnesses to the incident to come forward and speak to police.”

Anyone with information that can help the investigation should contact the Robbery Squad in Islington on 020 7421 0246 or call Crimestoppers anonymously on 0800 555 111.