British Prince William and his wife Catherine arrived in Quebec City Sunday morning aboard a Canadian warship on the fourth day of their nine-day national tour.

The Duke and Duchess of Cambridge attended an interdenominational religious service aboard the HMCS Montreal before embarking on several engagements, including a visit to a shelter for homeless youth and meeting with Canadian soldiers recently returned from Afghanistan, The (Montreal) Gazette reported.

Later in the afternoon, they were scheduled to fly to Charlottetown, Prince Edward Island.

A day earlier in Montreal, small groups of anti-monarchy protesters were drowned out by fans who lined up at several venues the couple visited.

Support for the British monarchy is lowest in Quebec among other provinces.

One group held up a large banner saying "Royal parasites! Go home!" and although riot police were on hand, no arrests or violence was reported.

During a visit to a hospital for children with cancer, the prince spoke with young patients in French, telling one with the informal "tu" instead of "vous" that the boy was strong.

As for the overnight trip along the St. Lawrence River to the provincial capital, Cmdr. Real Brisson told the Canadian Broadcasting Corp. the warship was surrounded by "hundreds of small pleasure craft" along the way.