BRUSSELS – Defence Minister Harjit Sajjan is in Brussels for a two-day NATO meeting to discuss the civil war in Syria, the battle against the Islamic State group.

NATO defence ministers should also approve plans Wednesday for increasing NATO’s forward presence in Eastern Europe to deter Russia, and discuss what the alliance might do to stanch the ongoing flow of migrants into Europe, the organization’s secretary-general said.

“Today and tomorrow, we will make decisions to strengthen our defence and deterrence,” NATO chief Jens Stoltenberg said as he arrived for the start of the two-day meeting.

Beefing up NATO’s presence in Poland and other allies close to Russia “will send a clear signal,” Stoltenberg said. “NATO will respond as one to any aggression against any ally.”

Measures being considered include stockpiling military equipment, building new infrastructure, and, in the NATO chief’s words, greater and more frequent “forward presence of multinational forces.”

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One NATO official, speaking on condition of anonymity because he was not authorized to make public statements, told The Associated Press the ministers on Wednesday will discuss a proposal to create a multinational unit under the alliance flag that could rotate from one Eastern European ally to another to provide enhanced deterrence.

The official said the unit could be brigade-sized – roughly 3,000 troops.

In the discussions held at NATO headquarters, U.S. Defence Secretary Ash Carter and his counterparts are also expected to discuss what other countries can do to more effectively deter Russia

following the Obama administration’s Feb. 2 announcement that it wants to quadruple spending on U.S. troops and training in Europe.

A senior NATO official, speaking on condition of anonymity because he was not authorized to discuss internal alliance deliberations, said the U.S. hopes its European NATO partners commit

to new investments in deterrence that would correspond to the $3.4 billion in extra spending and troops, equipment and training move the Pentagon is proposing.

Following a request by Turkey, ministers will also review what NATO could do to help slow the influx of migrants into Europe by sea, Stoltenberg said.

“We all understand the concern and we all see the human tragedy,” Stoltenberg said. He said the discussions could lead to a decision to use NATO air or sea assets to help combat

people-smuggling.

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Germany, the mostly popular destination country for the migrants, many of whom are fleeing war or poverty in their homelands in the Middle East or Africa, welcomed the move.

“It is good that the Turkish government has asked NATO to help for the surveillance of the sea. We are aiming at stopping the business of the smugglers,” German Defence Minister Ursula von der

Leyen said as she arrived at alliance headquarters.

Michael Fallon, the British defence secretary, said he would welcome “anything that can save lives in the eastern Mediterranean” and help disrupt the large-scale trafficking of people by smugglers.