Neil Lennon blamed "slapstick defending" for his Celtic side dropping two Clydesdale Bank Premier League points at home for the second week running.
The Hoops boss was raging after conceding an injury-time equaliser to Dundee United last week and watched in disbelief again as they passed up on the chance to leapfrog rivals Rangers at the top of the table after being two goals clear against Inverness and seemingly cruising.
"It was worse than deja vu," Lennon said. "I am absolutely livid. It's not the goals, it's the manner of the goals we lost from a very strong position."
He added: "We were two nil up and looking comfortable. It's a bit of complacency, slackness, lack of concentration and it's not good enough.
"You can't afford to do that at any level, never mind this level.
"The first goal is slapstick defending. It's two centre halves who are pretty consistent but who just give a simple goal away without the opposition having to work for it.
"That goal deflated the team and players have to hold their hands up and take responsibility sometimes.
"The goals we are giving away at the moment is calamitous and we have to deal with that very quickly.
"It's starting to creep in and it's something that we have to eradicate very quickly.
"We are obviously not getting the message through."
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