![Northern Greece: Two arrested for deadly explosion in primary school released](https://www.ot.gr/wp-content/uploads/2022/12/serres-3-1024x768-1.jpg)
Northern Greece: Two arrested for deadly explosion in primary school released
The two people arrested re the 52-year-old contractor who undertook the conversion of the heating burner into a geothermal heat pump at the school in question and a 43-year-old electrician.