Twenty-one masked men have been seen throwing molotov cocktails at a synagogue in central Gothenburg.

'We are in place with a number of units,' said Peter Nordengard, police chief of the West Western region, told the Expressen newspaper.

Police at the synagogue in central Gothenburg, which came under attack from molotov cocktails

Youths from the local Jewish community were attending a party inside the synagogue complex

A witness said he saw a ball of fire heading towards the synagogue

A march was held in Malmo to protest against President Donald Trump's decision to recognise Jerusalem as Israel's capital

Dvir Maoz, the World Bnei Akiva youth movement's emissary in Gothenburg, said the attack happened a little after 10 p.m. while youths from the local Jewish community were attending a party inside the synagogue complex.

He described looking out from inside the synagogue lobby area and from the corner of his eye seeing 'a ball of fire' approaching the building.

'The guards saw it in the security cameras and called police right away. The children were stressed, it was the first time they had ever experienced a terrorist attack near them.'

Allan Stutzinsky, chairman of the Jewish Assembly in Gothenburg, witnessed the attack and he said: 'There were tens of masked people throwing burning objects into the courtyard.'

The attacked happened after several hundred people marched through the centre of Malmo on Friday night to protest against President Donald Trump's recognition of Jerusalem as Israel's capital.

According to local media some chanted: 'We have announced the intifada from Malmo. We want our freedom back, and we will shoot the Jews.'