Four people have been arrested after the perimeter fence at RAF Waddington was breached.
Lincolnshire Police have this morning (Monday) arrested four people on suspicion of aggravated trespass - two men aged 52 and 51, and two women 64 and 30.
The Ministry of Defence (MoD) confirmed in a statement that the perimeter fence was breached.
The protest was about the use of armed drones which are controlled from the base.
An MoD spokesman said: "We fully respect people's right to protest peacefully within the law but have a duty to protect public property and to ensure that we meet operational needs.
"MOD has a duty to maintain security at all defence installations and uses all lawful means to do so.
"RAF Waddington like all large airfields has a large perimeter fence that is protected by a variety of security measures.
"Whilst some protestors did breach the perimeter fence, Reaper operations continued completely unaffected."