Toronto police have arrested a man and woman in connection with a cross-border trafficking investigation.

On March 16, the Canada Border Services Agency stopped a couple and their two children as they crossed into Canada via the Rainbow Bridge in Niagara Falls, Toronto police said in a statement Monday.

A search of the family's van resulted in the seizure of six concealed handguns, and a seventh was found on the man's body, police said.

Officers said they also found in the vehicle two inert hand grenades, ammunition, overcapacity magazines and knives.

Toronto police said that 34 firearms, including 20 handguns and hundreds of rounds of ammunition, were found in a subsequent search of the couple's home.

According to the statement, a subsequent investigation also found that five firearms allegedly smuggled into Canada by the couple have been recovered at crime scenes in Toronto and Peel Region, including one used in an attempted murder.

Donald Earl Hare, 44, and Amanda Brent, 43, of Proton Station, Ont. have been charged with 73 firearm and firearm-trafficking charges.

Both are scheduled to appear in court at Old City Hall on Tuesday.

Police ask anyone with information to contact them at 416-808-2526, call Crime Stoppers anonymously at 416-222-8477 (TIPS), text TOR and a message to 274637 (CRIMES), or leave a tip online or on Facebook.