Police said a 37-year-old man has been arrested on suspicion of aggravated burglary following the incident inside and outside a property in St Georges Street at around 2.15pm.
Laptops were among the items stolen in two burglaries.
The first break-in happened in Poppy Close between midnight and 6am on Thursday.
Jewellery, an iPad 4 and a Sony Vaio laptop were stolen, as well as keys which were used to take a silver Audi A3.
The car was later found at the junction of Swinburne Road and Shakespeare Road.
A second burglary happened in London Road between 6.30am on Saturday and 6.30pm the following day.
Entry was forced to a property and two laptops taken.
Anyone with information should contact the Ipswich Priority Crime Team quoting either IW/15/862 or IC/15/1037 on 101.
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