31 year old victim taken to hospital after attack on Thursday night.
House Prices Rise Fastest
House prices in in Milton Keynes and Northampton have shot up over the last year.
Homes typically piled £41 a day on to their value throughout 2014 as the housing market recovery gathered momentum.
The average property price in Northampton increased by £14,085 over the last year to reach £212,300 on average, according to Zoopla.
In Milton Keynes the prices increased by by £15,977, meaning the average house price now stands at £251,288.
Meanwhile, among the weakest-performing cities, average prices have edged up across 2014 by £978 in Bradford and by £1,346 in Hull.
For the second year in a row, Yorkshire and the Humber is the only region where house prices have fallen annually, recording an average decrease of £2,443.
Zoopla spokesman Lawrence Hall said: ``The property market has maintained its momentum during 2014, with price increases across most of the country despite initial concerns that the spate of regulatory policies designed to prevent risky lending would curb demand.
``More regions this year saw property prices increase compared with last year, indicating that the property market recovery continues and that the buoyancy will likely continue in 2015.''
Both robberies happened within 20 minutes of each other on Wednesday night.
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