Copenhagen Memorial Rally (file)
Copenhagen Memorial Rally (file)Reuters

Prime Minister Lars Lokke Rasmussen warned Sunday that Denmark still faces a "serious terror threat" as it marked a year since a Palestinian terrorist murdered a filmmaker and a Jewish security guard in twin attacks in Copenhagen.

The Danish capital honored the victims under tight security, as Rasmussen left flowers outside the cultural center and the synagogue targeted on February 14, 2015 by Omar El-Hussein, a 22-year-old Dane of Palestinian Arab origin.

An emotional day closed after dark when some 2,000 people walked in silence along route between the two locations attacked, lit by a chain of 1,800 candles.

"We must stand up and fight against hatred and violence," said Harold Ryan, a retired journalist who joined the 3.6-kilometer (2.2-mile) march with his wife.

El-Hussein opened fire with an automatic weapon at the cultural center where Swedish cartoonist Lars Vilks - reviled by Islamists for portraying Mohammed as a dog in 2007 - was attending a conference on freedom of expression.

Danish filmmaker Finn Norgaard, 55, was murdered and three policemen were wounded. After managing to escape, the assailant shot dead a 37-year-old Jewish security guard, Dan Uzan, in front of a synagogue, also wounding two police officers.

El-Hussein, seemingly inspired by the attacks on French satirical weekly Charlie Hebdo, was killed a few hours later in a shootout with police in Copenhagen's immigrant-heavy Norrebro district.

"Serious terror threat"

Rasmussen told journalists Sunday: "The Danes have shown that we insist on living our peaceful life."

"We must live in harmony...must protect democracy and tradition which we have had for years in Denmark, to live side by side even if we believe in a different God," he said.

He added: "We're in a situation where there is still a serious terror threat against Denmark - that is unchanged. But it is also a situation where we have acted...we have equipped our intelligence service, we have equipped our police."

Later the Danish leader attended an event at parliament organized by the Finn Norgaard Association, a charity for immigrant youngsters set up in the filmmaker's name.

"What we want in the association is to ensure that something as insane as what took Finn away from us does not happen again," its founder Jesper Lynghus told AFP.

El-Hussein, who had been released from prison weeks before the attacks after serving time for a stabbing, pledged allegiance to the Islamic State (ISIS) jihadist group on his Facebook page on the day of the attack.

Danish intelligence agency PET was criticized for failing to act on information from prison services that he was at risk of radicalization, and former classmates said they tried to warn police as far back as 2012.

"Used to living with terror"

Four men charged with helping El-Hussein will appear in court next month.

Danes "have become used to living with terror and don't let it dominate" life, Magnus Ranstorp, an expert on radical Islamic movements at the Swedish National Defense College who helped Copenhagen officials devise an anti-radicalization plan, told AFP.

Nearly every year in the past decade, authorities have thwarted terror attacks said to be linked to Denmark's involvement in the Iraq and Afghanistan wars, and to the Mohammed cartoons published in the Jyllands-Posten newspaper in 2005, Ranstorp said.

Denmark's already tough tone on Muslim immigration has hardened further over the past year, partly as a result of the attacks but also due to Europe's refugee crisis.

Denmark registered 21,000 asylum applications in 2015, making it one of the top European recipients of migrants relative to its size.

Once a champion of refugee rights, attitudes have gradually shifted along with the rise of the anti-immigration Danish People's Party over the past 15 years, with concerns rising further in the wake of a wide string of rapes and sexual assaults registered throughout Europe on New Year's Eve.

The concerns also stem from the fact that terrorists have infiltrated the influx of migrants and launched attacks, including in the lethal Islamic State Paris attack last November in which 130 people were murdered.

AFP contributed to this report.