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The club released a statement following the 2-1 defeat at Hull on Saturday, insisting Bilic’s position is ‘not under threat’.
The Croatian has found himself under pressure, with the Hammers sitting just six points above the relegation places having lost their last four Premier League matches.
Former West Ham striker Ashton, asked to explain their poor form this season on talkSPORT, said: “It is the recruitment.
“At the weekend they lose [Michail] Antonio - one of their better players - and it shows.