Police have arrested four men in connection with a firearms incident in Spalding.
As previously reported, a man was reported to police at 9.32am on Monday, May 13 suspected of carrying a gun.
Officers closed off the A151 Winsover Road to investigate the reports. The road has since been reopened.
At the time, they arrested a 21-year-old man on suspicion of possession of a firearm, who remains in custody.
Now the force says it has arrested a further three men aged 24, 28 and 31 in connection with the incident.
Anyone with information is being asked to call police on 101, quoting incident 107 of May 13.