Heavyweight challenger David Haye from Britain stunned journalists when he turned up for a pre-fight news conference wearing a "bad-taste" t-shirt and declaring war on the Klitschko brothers, RIA Novosti reported.

IBF and WBO heavyweight champion Wladimir Klitschko from Ukraine was so enraged when he saw the cocky Londoner in a t-shirt depicting Haye holding aloft the two decapitated heads of the brothers, he pledged to "punish him" at their upcoming bout on June 20 in Germany.

Normally restrained `Dr. Steelhammer` Klitschko (52-3, 46 KOs) was quoted on the BoxingScene.com website as saying, "I find the t-shirt in bad taste and cruel, but I will punish you. I will make the fight a long trial and will only knock you out in the 12th round."

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The 28-year-old British boxer (22-1, 21 KOs) has accused Wladimir of only fighting cowards and told journalists, "I have declared war on the Klitschko family, first on Wladimir and then Vitali, that is the plan and on June 20 the war will begin... I have seen many of Wladimir`s fights and they bored me. Jab, jab, right. That is all he can do. He will live his worst nightmare."

This is not the first time that Haye has been involved in a scrap with the Klitschkos. Last December a scuffle broke out in a restaurant when the Briton presented brother Vitali (37-2, 36 KOs) with a British edition of Men`s Health magazine, which had a photo of Haye posing with the decapitated head of Wladimir.

Haye has repeatedly said that once he had finished with Wladimir, he would go after his older brother Vitali to get his WBC champion`s belt.

RIA Novosti