Four people have been injured after they were sprayed with an ‘unknown substance’ outside the University of Greenwich last night.

Metropolitan Police officers were called to reports that a man had been attacked at the Avery Hill campus in South East London just before 12.15am this morning.

Paramedics treated a man with head injuries and took him to hospital, and detectives at the scene found three other people were also sprayed with the substance.

Tests were carried out and it was confirmed that the substance was non-toxic. None of the victims suffered any life-threatening injuries, and no arrests have been made.

The campus opened as normal this morning – although staff, students and visitors were being directed to an alternative way in after the main entrance was closed. 

The University of Greenwich’s Avery Hill campus in South East London (file picture)

A Metropolitan Police spokeswoman told MailOnline: ‘On Tuesday, December 10 police were called to Avery Hill Road, SE9 at 0.13am following reports that a man had been attacked and sprayed with an unknown substance.

‘Officers attended the scene alongside the London Ambulance Service who treated a man for head injuries on scene before taking him to hospital.

‘Whilst conducting enquiries on scene, officers found that three other people were sprayed with the substance. Tests were carried out and it was found that the substance was non-toxic.

‘None of the victims suffered any life-changing or threatening injuries. At this early stage, there have been no arrests and urgent enquiries are ongoing. A crime scene remains in place.’

A University of Greenwich statement on social media said: ‘Following a police incident in front of our Avery Hill campus overnight, the main entrance is currently closed, although the rest of the campus is open as usual.

Avery Hill campus (file picture) opened as normal today although the main entrance was closed

‘Staff, students and visitors will be directed to an alternative entrance by stewards on arriving at the campus.

‘There may be some delays to the campus bus service as a result. We will keep you updated this morning to advise when the main entrance is reopened.’

MailOnline has contacted the university for comment. It has not been confirmed whether those attacked were students, staff or other members of the public. 

Anyone with any information that may help the police investigation has been urged to call 101 stating the reference number CAD45/10DEC24