This is the Global News Podcast from the BBC World Service.

I'm Paul Moss and in the early hours of Sunday, the 25th of August, these are our main stories.

Islamic State has said the man who carried out a mass stabbing in Germany was one of their soldiers out to avenge the suffering of Muslims in Gaza.

Meanwhile in France police are investigating a bomb attack on a synagogue and Ukraine has marked

independence day with President Zelensky announcing a large prisoner exchange with Russia. Also in this podcast, our core value is safety and it is our North Star.

Why two astronauts stranded in the International Space Station won't be coming back until next year,

and the Tiktok star driving a cucumber shortage in Iceland.

The city of Zollingen in Western Germany has a long standing claim to fame.

For hundreds of years it's been known as a manufacturing hub for swords and later knives of all kinds. It's nicknamed the City of Blades.

Well that now seems horribly ironic with Zollingen the site of a mass stabbing.

It happened on Friday evening during celebrations of the city's 650th anniversary.

A man began stabbing people apparently at random. Three were killed. Eight others were left seriously injured. Among those attending was Annie Stosberg, a journalist with the local radio station, R.S.G.

Suddenly the music stopped and then a man came on stage and he explained that there was a

stamping not far away from us and he said please don't panic but go home because we don't know where

the man is who the man is police in Germany arrested two people including a

15 year old boy in relation to the attack.

Then, shortly before recording this podcast, the German authorities announced that another

suspect had been arrested.

The media are reporting that he handed himself into a police patrol saying

I am the man you're looking for. Before this, the attack was claimed by the Islamic State

group. Unusual, as I.S. doesn't usually claim responsibility for attacks

while the perpetrator is alive and at large and as a jihadist correspondent

...