Police have arrested two men after properties were raided in Bengeo and on the Pinehurst Estate.
The armed raids were carried out in Divot Place and Manor Close, with local officers and a police helicopter taking part.
Two men were arrested and properties searched.
It is unclear what lead to the raids or what information the police were acting on.
In a statement on social media, police said: "We have made arrests and are carrying out searches at two properties in Hertford
"It follows warrants carried out earlier in Divot Place and Manor Close.
"Armed and local officers and the helicopter were in attendance.
"Two men are in custody."
This hyperlocal news section is currently an experimental feature of Discover Hertford Online. It is an evolving service so if you have any comments or feedback you can use our forum, Twitter or the contact form.
You can also visit our news archive that features stories from 2009-2014.
Want to submit a news item?
If you have a press release you'd like to send us or you'd like us to cover a news story related to Hertford please email news.team(at)hertford.net.
If you're interested in sponsoring this news service please see our advertising options.