Over the weekend, a large number of rockets have been fired at Israel from Gaza. The Israeli air force has carried out a number of air strikes.
“These incidents are tragic for those affected. It is vital to stop the use of violence and prevent more loss of life,” said Mr Støre.
The increasing use of violence in the south of Israel and in Gaza is also undermining the opportunity to find a solution to outstanding political issues between the Israelis and the Palestinians.