Swans chairman Huw Jenkins says the club parted company with Brian Flynn and Kevin Reeves because the pair live miles from the Swansea area. "The last few months have proved difficult with their families based up north, that has made it hard to plan for the future," he told BBC Sport.
"We're setting down parameters that people need to be based full time in this area and put Swansea City first.
"Saying that, we have seen only 100% commitment from Brian and Kevin."
A statement on the club's official website says that the managerial pair, who signed new two-year contracts last summer, left the Vetch by mutual consent.
Jenkins insisted that they had not been sacked because of a slump in form.
"We're looking at bigger issues than recent performances," Jenkins said.
"Our initial aim this season was to avoid a crisis like last year when we nearly dropped out of the league. "We had great success at the start of the season when we were challenging for the top of the table, but we were flattering to deceive and the gradual decline since October has been difficult to address.
"We have to be reasonably satisfied, but things can't slide backwards and we have to move forward next year."
Speculation over Flynn's successor at the Vetch has already begun, with former Stoke and Sunderland boss Steve Cotterill an early favourite, but Jenkins dismissed such talk as idle gossip.
"(Caretaker boss) Alan Curtis is perfectly capable of taking control in the short term, but we don't have anyone in mind as a permanent replacement," said Jenkins.
"There has been no pre-planning as I didn't know Brian was going to leave until Thursday.
"No doubt there are rumours, but I can confidently say that I haven't met anyone or had discussions about Brian's successor.
"We're in no rush to appoint and have time to get it right before next season."
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There has been no pre-planning as I didn't know Brian was going to leave until Thursday 
"This is terrible news for Swansea"