Mitchell McClenaghan took six wickets in two matches for Middlesex before injuring his pelvis.

Bustling Black Caps fast bowler Mitchell McClenaghan is expected to be out of action for at least six weeks after sustaining a stress fracture to his pelvis.

The fiery left-arm quick, who has played 48 one-day internationals and 28 T20 internationals for New Zealand, suffered the injury while playing for Middlesex in the English county cricket T20 competition, espncricinfo.com reported.

McClenaghan, 30, will play no further part in the NatWest T20 Blast, but it appears the injury will not affect his international involvement.

The limited overs specialist is yet to play test cricket and was not named in the Black Caps squad for their test-only tours of Zimbabwe and South Africa in July and August.

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New Zealand's next limited overs matches are the 50-over leg of the September and October tour of India, which is almost three months away.

McClenaghan took six wickets in two matches for Middlesex and club managing director of cricket Angus Fraser was disappointed to lose his services.

"Losing Mitchell is a big blow for us," Fraser said.

"He is an outstanding white-ball bowler who brings variety, skill and nous to any side he plays for."

Prior to linking up with Middlesex, McClenaghan was a standout player in this year's Indian Premier League for the Mumbai Indians.

He took 17 wickets in 14 matches at an average of 25.64, finishing sixth on the leading wicket-takers list in the star-studded T20 competition.