The attack also wounded at least 15 others
Gayle, a big-hitting left-hander, said: "In 50-over cricket, definitely the World Cup (is the end). I'm looking to draw the line there ... let the youngsters have some fun and I can sit back in the party stand and watch them.
"It is a big year for me, to be honest. I hope 2019 can finish for me on a great note."
He averages 37.12 in ODIs, with 23 centuries and a highest score of 215, ahead of the five-match series against England that begins on Wednesday.
After those matches and three Twenty20s, the West Indies take part in an ODI tri-series with Ireland and Bangladesh in May before the World Cup starts later that month. He is expected to continue playing in the Twenty20 format.
The attack also wounded at least 15 others
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