Two people suspected of links to the Islamic State group and accused of planning an attack against "state dignitaries" have been arrested in Turkey ahead of a visit by top EU officials, local authorities said Saturday.

The arrests took place overnight in Konya, in the center of the country, as Turkey prepared for a visit by European Council head Donald Tusk and German Chancellor Angela Merkel in Gaziantep, which borders Syria and territories controlled by IS.

U.S. President Barack Obama has hailed German Chancellor Angela Merkel's "courageous" leadership in opening doors to migrants fleeing the Syrian conflict.

"I believe that Chancellor Merkel's approach to the refugee crisis -- and that of many Germans -- has been courageous. She's demonstrated real political and moral leadership," Obama said in an interview published Saturday with German daily Bild.

Unidentified attackers hacked to death a university professor in Bangladesh on Saturday, police said, adding that the assault bore the hallmarks of previous killings by Islamist militants of secular and atheist activists.

Police said English professor Rezaul Karim Siddique, 58, was hacked from behind with machetes as he walked to the bus station from his home in the country's northwestern city of Rajshahi, where he taught at the city's public university.

North Korea on Saturday tested what appeared to be a submarine-launched ballistic missile in the Sea of Japan, the South Korean defense ministry said.

"North Korea launched a projectile which was believed to be a submarine-launched ballistic missile (SLBM) around 6:30 pm (0930 GMT) in the East Sea (Sea of Japan) near the northeastern port of Sinpo", a defense ministry spokesman said.

The European Union has "sold out to Turkey" in its handling of the refugee crisis and the consequences are "impossible to predict," Hungary's prime minister warned in an interview published Saturday.

Viktor Orban launched the salvo in an interview with the German weekly Wirtschaftswoche as German Chancellor Angela Merkel and top EU leaders head to Turkey to boost a migrant deportation deal that has been slow to get off the ground.

The Pakistani Taliban have claimed the killing of a provincial minister for minority affairs who was shot dead in a restive northwestern district.

Gunmen on motorbikes stopped Sardar Soran Singh's car in Buner district, some 160 kilometers (100 miles) northeast of Peshawar, Friday evening and opened fire, killing him on the spot.

About 200 demonstrators gathered late Friday in Montreal to give the "Up All Night" protests sweeping France a go, and see if they can press for political results across the Atlantic.

The goal of the event, said student Pauline, is "to create spaces for people who were not involved in politics. It's a movement of citizens."

Angela Merkel and top EU officials travel to Turkey on Saturday for a high-stakes visit which will see them walk a diplomatic tightrope between keeping Ankara sweet over a crucial migrant deal and taking a stand on European values.

European Council head Donald Tusk, European Commission Vice President Frans Timmermans and the German chancellor will visit a refugee camp at 1100 GMT in Gaziantep on the Turkish-Syrian border.

The head of a Spanish anti-corruption group that championed several high-profile cases over the past two decades, including one against Princess Cristina, now finds himself under investigation for extortion.

A judge this week ordered the founder and leader of "Manos Limpias" (Clean Hands), retired Madrid city hall employee Miguel Bernad, 74, to be remanded in custody while a probe is conducted into a blackmail and extortion ring he allegedly ran.

Until recently, Sevnica was best known for its lingerie and furniture factories and a charming 900-year-old castle. But that was before Donald Trump launched his bid to become US president.

It was in this small industrial Slovenian town of 5,000 people, back when it was part of Communist Yugoslavia, that Trump's current wife, Melania Trump, 24 years his junior, came into the world on April 26, 1970.