According to Dublin Live, about 30 young men were seen running out of the premises in the early hours of Sunday morning.
The scene remained closed off to the public this morning, and Police have since confirmed that a number of weapons have been seized and a man in his 20s arrested in connection with the incident.
One person in attendance at the gig told Dublin Live that Police arrived on the scene and “drove everyone out” before shutting the show down.
“An African artist ‘Naira Marley’ was headlining a show at Lost Lane yesterday with some other upcoming acts.
“We came for the event which started around 10:30pm.
“People were waiting for the artist to perform when all of a sudden Police came to the venue, drove everyone out and shut it down.
“Afterwards Poilce came in tens and filled everywhere. Everyone was still surprised and curious as to what was going on because no gang attacked or anything.
“They [the crowd] filled the street around the venue confused as to where to go and some [were] angry at the organisers asking for refund.”
One onlooker passing by the area this morning told Dublin Live that it was sealed off by police who were carrying out an investigation.
In a statement, police confirmed that investigations are ongoing.
A Police spokesman said:
“Gardai are investigating an incident where a large number of male youths congregated outside a premises on Adam Court, Dublin 2 at approximately 1am on 7 July 2019.
“A number of offensive weapons were located after the youths departed and were seized by Gardaí. One male in his early 20s was arrested and was charged in relation to this offence. Investigations are ongoing.”