Parents in Co Louth have been warned to be vigilant after a number of children were approached by strangers.
A number of primary schools sent text messages to parents to warn them of the incidents.
Gardaí are investigating two incidents in the south Louth area.
In the first a young boy was called by his name as he played with friends at a playground.
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A car, believed to be a black Volkswagen Golf, pulled up beside the recently opened playground in Dunleer.
The second suspicious incident was at Monasterboice where a man in a white van called to a group of children last Sunday afternoon.
As with the earlier incident the children did not respond and instead ran from the van.