Tohu Harris out of Warriors NRL clash

Second rower Tohu Harris has been ruled out of the Warriors' NRL game against St George Illawarra in Wollongong tomorrow.

The 26-year-old Kiwi international, who was set to make his comeback after an injury to his left knee, has now injured his right knee in a training session.

He's returning home for immediate minor surgery.

It's yet to be determined when he is expected to be fit to play again.

Meanwhile Canterbury put a massive dent in Brisbane's top-four NRL hopes, shocking the finals-bound Broncos 36-22 in Sydney last night.

After they leapt to a 14-0 lead early, the Bulldogs withstood a late first-half fightback from Brisbane before scoring three second-half tries in seven minutes to wrap up the win.

It completed their first back-to-back wins of the year and put them one step further away from the wooden spoon.

And it also left Brisbane vulnerable with the possibility they could be two wins outside the top four at the end of the round.

The loss was Brisbane's fourth against a bottom-eight side, and left them in danger of finishing the round in eighth with a negative for-and-against.

"I'm extremely disappointed by it," coach Wayne Bennett said.

"They had all the enthusiasm and all the energy and we're just lacking in those areas.

"Our problem is we get two or three weeks of football and we throw one of these games in. And it's against the bottom eight teams on all the occasions."

The match wasn't free of controversy, with the NRL confirming they will investigate alleged comments made by a Bulldogs trainer to a referee at half-time.

It's understood the Bulldogs were upset when Josh Morris was denied a quick tap in the first half where he crossed to score before being called back.

Regardless, halves Lachlan Lewis and Matt Frawley were tremendous for Canterbury as they put on their equal-highest score of the season.

In his sixth game, Lewis had two try-assists - including a pinpoint perfect kick for Josh Morris in the second half - forced two line dropouts and made a point of shutting down the far bigger Tevita Pangai in defence.

"He was terrific," coach Dean Pay said.

"There are parts of his game we need to work on and get better.

"But his attitude and effort with what he does with his footy is terrific."