なにやら

なにやら is used when the speaker feels that something is happening or there is some information, but cannot specify what it is. It adds a sense of vagueness or mystery, often signaling that the speaker has heard, noticed, or inferred something without being able to state the exact cause or content. It frequently precedes a clause or a conjectural statement (e.g., そうだ, らしい, ようだ) to express uncertainty about what is occurring.