Four more ready-made sandwich brands have been pulled from shelves following the massive recall of Maple Leaf Foods meat products.

In its first statement early Tuesday, the Canadian Food Inspection Agency (CFIA) said Metro Ontario Incorporated is warning the public not to eat its Fresh 2 Go turkey sandwiches.

The sandwiches, which contain the ready-to-eat deli meat products recalled by Maple Leaf Foods, were sold in A & P and Dominion stores in Ontario.

In a second statement, CFIA said Prepared Foods Limited has issued a warning about not consuming the Irving, Sub Delicious, and Needs brand sandwiches.

The sandwiches, which also contain Maple Leaf meat products, were sold in New Brunswick, Nova Scotia, and Prince Edward Island.

Maple Leaf issued a limited recall after Listeria bacteria was found on some of the products produced at one of its Toronto plants.

The company then recalled all meat products that were manufactured at its Toronto facility after three people died in Ontario, and one in British Columbia.

The expanded list -- described as precautionary by Maple Leaf -- now includes up to 220 products.

Currently, at least six people have died and at least 20 are sick because of the same strain of bacteria found at the plant.

"There are inspectors all over the country as well as public health officials visiting establishments, restaurants and institutions to ensure this product is removed from the marketplace," CFIA spokesman Garfield Balsom told CTV's Canada AM on Tuesday.

CFIA officials and Maple Leaf executives say more testing is need to determine if the tainted meat directly contributed to any of the deaths.

"That would be an investigation by the Public Health Agency of Canada and the local health units," Balsom told The Canadian Press. "They do the food history, so they would make the linkages."

The disease has an incubation period of up to 90 days, meaning there could be more cases in the coming weeks.

Lawsuit

Meanwhile, a Montreal lawyer who specializes in class-action lawsuits has launched legal action against Maple Leaf Foods.

Tony Merchant, of Merchant Law Group, said the suit will represent three classes of people -- those who have become sick after ingesting the food, those who have suffered a financial loss for having to throw meat out and those who are suffering from mental distress because of the outbreak.

"All sorts of people have eaten the meats and have the reasonable expectation that they may be endangered," said Merchant. "So, for the next 90 days, they're not even going to know if they have a problem.

"We believe that in this kind of an instance there may be millions of people who are entitled to compensation."

The suit is being launched in four provinces -- Ontario, Quebec, Manitoba and Saskatchewan.

Juanita Melvin, a plaintiff in the Maple Leaf lawsuit, got sick after eating one of the tainted products.

"I wasn't sure why I was sick and then I heard about the outbreak," Melvin told CTV's Canada AM on Tuesday from Quebec. "I went into a panic because in 1981 I lost my son because of the same bacteria."

Merchant said it could take months before a judge approves the cases and years before the complainants receive compensation.

"We'll find out whether Maple Leaf handled the recall properly and we'll find out whether they knew about the problems and reacted early enough," said Merchant.