Diamorphine worth an estimated €20,000 has been seized by gardai in Dublin.
Two men in their early 30s were searched in Store Street last night and found to be in possession of the drugs.
They were arrested and are detained at Store Street Garda Station under the provisions of Section 2 of the Criminal Justice Act.
A garda spokesman said the arrests are part of an on-going intelligence led operation targeting the illegal sale and supply of controlled drugs in the north inner city.
Toddler naps can harm sleep
Children who nap beyond the age of two are more likely to have problems sleeping through the night, research suggests.
A study found that daytime napping past the age of two led to toddlers taking longer to fall asleep in the evening, along with reduced sleep quality and duration.
Researchers in Australia analysed studies around the world including one which found that among children attending a nursery school where napping was optional, the onset of sleep was later on evenings following a nap.
Racist chants by Chelsea fans
A group of Chelsea thugs prevented a black man getting on to a train in Paris before chanting: "We're racist and that's the way we like it."
Footage posted online shows the football fans shouting and gesturing at the man before pushing him out of the carriage when he steps in.
The supporters are thought to have been travelling to the Parc des Princes ground for Chelsea's Champions League match against Paris St Germain last night, which ended in a 1-1 draw.
They also chanted at bemused onlookers: "Where were you in World War Two?"
Chelsea released a statement condemning the incident.
"Such behaviour is abhorrent and has no place in football or society," the club said.