Premiership leaders Northampton have handed undisclosed-length contract extensions to back-row forwards Teimana Harrison and Jonathan Fisher.
Academy product Harrison, 22, has made 22 appearances since his debut as a 19-year-old against Wasps in 2012.
Former London Irish player Fisher, 26, has played eight times for the Saints after joining last year.
"We're delighted that both Teimana and Jon will be staying," director of rugby Jim Mallinder told the team website.
"Both players have played important roles in their time at the club and we're confident that they have more to give, both during the run in and for the coming years."