Corey Anderson's recurring back injury has returned, ending his Tweny20 stint at Somerset and forcing him to return immediately to New Zealand.
The big-hitting left-hander had played a key role in the English country T20 Blast competition for Somerset, who sit second in the South Group and are well placed for the next stage of the competition.
Anderson, 26, has battled ongoing back problems since May last year, after injuring it in New Zealand's first test loss to England at Lord's.
He played in four of New Zealand's five ODIs against India in October, but aggravated his back the following month and returned as a batsman only for the Black Caps Twenty20 series against Bangladesh
On Monday (NZT), Anderson blasted Somerset to a 32-run Duckworth-Lewis victory over Sussex with an unbeaten 41 from 17 balls, which included four fours and three sixes.