A 57-year-old man needed hospital treatment after being sprayed in the face with a “suspected noxious substance” in north London.
A second man is also thought to have been injured in Saturday’s attack but has not yet been found, police said.
It happened at about 7.45pm in Rostrevor Avenue, Stamford Hill.
One witness said both men had been Jewish – but Scotland Yard has moved to assure people the incident is not being treated as anti-Semitic.
A Scotland Yard spokesman said on Sunday: “We were called to reports of two men sprayed in the face with a suspected noxious substance.
<blockquote class="twitter-tweet" lang="en"> <p dir="ltr" lang="en">A serious assault on 2 Jewish ppl <a rel="nofollow" target="_blank" href="https://twitter.com/hashtag/RotrevorAvenue?src=hash" class="body-link" data-vars-item-name="BL-3114761-https://twitter.com/hashtag/RotrevorAvenue?src=hash" data-vars-event-id="c23">#RotrevorAvenue</a> <a rel="nofollow" target="_blank" href="https://twitter.com/hashtag/Haringey?src=hash" class="body-link" data-vars-item-name="BL-3114761-https://twitter.com/hashtag/Haringey?src=hash" data-vars-event-id="c23">#Haringey</a> <a rel="nofollow" target="_blank" href="https://twitter.com/hashtag/N15?src=hash" class="body-link" data-vars-item-name="BL-3114761-https://twitter.com/hashtag/N15?src=hash" data-vars-event-id="c23">#N15</a> <a rel="nofollow" target="_blank" href="https://twitter.com/hashtag/Hatzola?src=hash" class="body-link" data-vars-item-name="BL-3114761-https://twitter.com/hashtag/Hatzola?src=hash" data-vars-event-id="c23">#Hatzola</a> and <a rel="nofollow" target="_blank" href="https://twitter.com/ShomrimOfficial" class="body-link" data-vars-item-name="BL-3114761-https://twitter.com/ShomrimOfficial" data-vars-event-id="c23">@ShomrimOfficial</a> <a rel="nofollow" target="_blank" href="https://twitter.com/MPSHaringey" class="body-link" data-vars-item-name="BL-3114761-https://twitter.com/MPSHaringey" data-vars-event-id="c23">@MPSHaringey</a> on scene <a rel="nofollow" target="_blank" href="https://t.co/obJf1nOKyc" class="body-link" data-vars-item-name="BL-3114761-https://t.co/obJf1nOKyc" data-vars-event-id="c23">pic.twitter.com/obJf1nOKyc</a> — aay jay (@Ajmanutd10) <a rel="nofollow" target="_blank" href="https://twitter.com/Ajmanutd10/status/665621028526268416" class="body-link" data-vars-item-name="BL-3114761-https://twitter.com/Ajmanutd10/status/665621028526268416" data-vars-event-id="c23">November 14, 2015</a>
“We attended and found one victim, believed aged 57. The second is believed to have left the scene prior to police arrival.
“The first man was taken to hospital for treatment. His injuries were described as minor and he did not wish to substantiate the allegations.
“The second victim has not been identified.”
Jewish neighbourhood watch group Shomrim and ambulance service Hatzola were also on the scene.
