Denmark's government on Tuesday offered to lead a NATO mission to train Iraqi forces, saying it was prepared to send 200 troops to Iraq at the end of next year.

Denmark on Thursday suspended arms sales to Saudi Arabia over the murder of journalist Jamal Khashoggi, the second country to do so after Germany.

Denmark and Sweden on Wednesday extended their border controls until November to curb the tide of migrants into their nations, saying the European Union still lacked security at its external borders.

Denmark received more than 21,000 asylum applications in 2015, a 44 percent jump from 2014 but significantly less than its northern neighbor Sweden, which registered 163,000 applications in the same year.

Denmark's government said on Thursday it wants to replace its ageing fleet of fighter jets with 27 U.S.-built Lockheed Martin F-35A Lightning II fighters.

"We can monitor our airspace... and work in wars and conflicts around the world," Prime Minister Lars Lokke Rasmussen said at a press conference.

Denmark on Monday extended random identification checks along the German border until June 2, saying they were needed to deter "an extraordinarily large number of refugees and migrants" from entering the country.

"There is still considerable pressure on Europe's borders and... migrants and refugees find alternative routes when the borders are closed," Integration Minister Inger Stojberg said in a statement.

Denmark's government said Friday it wanted to ban travel to areas where terror groups are operating in conflict zones in a bid to facilitate the prosecution of fighters returning from Syria.

The move came a day after four men were arrested in the Copenhagen area on suspicion of having joined the Islamic State jihadist group while in Syria.

Copenhagen police said Thursday they had detained four people on suspicion of joining the Islamic State group in Syria and seized weapons and ammunition in a search linked to the arrests.

All four were suspected of breaking Denmark's terrorism law while in Syria, and were arrested in the Copenhagen area, police said in a statement without giving any further information on their identities.

Four men went on trial in Denmark on Thursday accused of helping the gunman behind twin attacks on a Copenhagen synagogue and a free speech event last year that left two people dead.

The trial, being held under heavy security, comes with Europe still on high alert over fears of jihadist violence following two bloody attacks in Paris in 2015.

A 16-year-old Danish girl arrested in January was planning to carry out bomb attacks against two schools, one of which was Jewish, Danish police said on Tuesday.

The girl was allegedly helped by a 24-year-old man who Danish media said had been fighting in Syria, though it was not clear for which side, according to the preliminary charges presented in a court in the town of Holbaek, 70 kilometers (45 miles) west of Copenhagen.

Denmark is ready to send F-16 fighter jets and 400 troops to Iraq and Syria to fight the Islamic State group, Prime Minister Lars Lokke Rasmussen said Friday.

A majority of political parties in parliament's foreign affairs committee expressed support Friday for the government's proposal, and "the government will on the basis of today's meeting submit a bill to a parliamentary vote to strengthen the campaign against IS," a statement from the prime minister's office said.