A fourth man has been charged with the alleged murder of a bikie associate in Brisbane after spending almost a week on the run.

Levi Johnson, 23, was allegedly ambushed outside a Mansfield gym on Monday before being chased and stabbed multiple times.

A 24-year-old man was arrested by heavily armed Police at accommodation in Warwick on Saturday night following several appeals for information on his whereabouts.

A 24-year-old woman was also taken into custody.

The man has been charged with one count of murder.

He is expected to front Ipswich Magistrates Court on Monday.

The woman is assisting Police with inquiries.

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The arrests follow that of another man on Friday night.

Thomas Friedrich Myler, 35, had his matter briefly mentioned in court on Saturday.

Myler did not appear and there was no application for bail with the matter to return to court on October 4.

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