Two suspects tried to escape from armed gardai by jumping out a first-floor window when officers raided an apartment yesterday.
An estimated €200,000 of cocaine, cannabis and ecstasy was seized in the raid in Ballymahon, Co Longford, which was carried out by officers attached to the local drugs unit.
Two Polish men - one aged 30 and the other 31 - were arrested at the scene and were last night being quizzed at Longford Garda Station under drugs trafficking legislation.
Sources say that one of the arrested men is the subject of a European Arrest Warrant in his native country involving violent offences in Warsaw.
"The Armed Support Unit were involved in this raid and an Aladdin's cave of drugs was found in this seizure, a result of an intelligence operation by local gardai," a senior source told the Herald.
"The individuals, who have not been in the country that long, tried to escape by jumping out the window when gardai entered the property but they did not get too far and they are now in custody."
Gardai announced details of the drugs seizure, stating that "during the course of the search cannabis worth €100,000, cocaine to the value of €70,000 and MDMA worth €30,000 was seized".
Detectives will now attempt to establish which Irish gang the suspects are linked to, if any.
However, sources say that gardai are becoming increasing concerned about eastern European drug gangs operating in this country.
The seizure is the most significant crime in Co Longford since the virus pandemic hit Ireland last month.
The county had been gripped by a feud that had escalated since February but there have been no incidents in that bitter dispute in recent weeks.
Gardai say that Operation Stola, targeting the feuding criminals, is still "very much ongoing" but the gang thugs are mostly staying at home with the country in lockdown.
There have been dozens of violent incidents and gardai have managed to secure charges against many of the protagonists but armed officers continue to patrol the streets of the county.