diff --git a/cmd/frostfs-cli/modules/object/util.go b/cmd/frostfs-cli/modules/object/util.go
index ff6b3219d..381c790e9 100644
--- a/cmd/frostfs-cli/modules/object/util.go
+++ b/cmd/frostfs-cli/modules/object/util.go
@@ -354,7 +354,7 @@ func collectObjectRelatives(cmd *cobra.Command, cli *client.Client, cnr cid.ID,
 
 	Prepare(cmd, &prmHead)
 
-	_, err := internal.HeadObject(cmd.Context(), prmHead)
+	o, err := internal.HeadObject(cmd.Context(), prmHead)
 
 	var errSplit *objectSDK.SplitInfoError
 	var errEC *objectSDK.ECInfoError
@@ -364,6 +364,9 @@ func collectObjectRelatives(cmd *cobra.Command, cli *client.Client, cnr cid.ID,
 		commonCmd.ExitOnErr(cmd, "failed to get raw object header: %w", err)
 	case err == nil:
 		common.PrintVerbose(cmd, "Raw header received - object is singular.")
+		if ech := o.Header().ECHeader(); ech != nil {
+			commonCmd.ExitOnErr(cmd, "Lock EC chunk failed: %w", errors.ErrUnsupported)
+		}
 		return nil
 	case errors.As(err, &errSplit):
 		common.PrintVerbose(cmd, "Split information received - object is virtual.")
diff --git a/pkg/core/object/fmt.go b/pkg/core/object/fmt.go
index b997aa182..96f721806 100644
--- a/pkg/core/object/fmt.go
+++ b/pkg/core/object/fmt.go
@@ -14,7 +14,6 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/netmap"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/acl"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	frostfsecdsa "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/crypto/ecdsa"
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
@@ -41,30 +40,12 @@ type cfg struct {
 	verifyTokenIssuer bool
 }
 
-// DeleteHandler is an interface of delete queue processor.
-type DeleteHandler interface {
-	// DeleteObjects places objects to a removal queue.
-	//
-	// Returns apistatus.LockNonRegularObject if at least one object
-	// is locked.
-	DeleteObjects(oid.Address, ...oid.Address) error
-}
-
 // LockSource is a source of lock relations between the objects.
 type LockSource interface {
 	// IsLocked must clarify object's lock status.
 	IsLocked(ctx context.Context, address oid.Address) (bool, error)
 }
 
-// Locker is an object lock storage interface.
-type Locker interface {
-	// Lock list of objects as locked by locker in the specified container.
-	//
-	// Returns apistatus.LockNonRegularObject if at least object in locked
-	// list is irregular (not type of REGULAR).
-	Lock(idCnr cid.ID, locker oid.ID, locked []oid.ID) error
-}
-
 var errNilObject = errors.New("object is nil")
 
 var errNilID = errors.New("missing identifier")
diff --git a/pkg/local_object_storage/engine/head.go b/pkg/local_object_storage/engine/head.go
index 97fb5be3a..92d1b20fc 100644
--- a/pkg/local_object_storage/engine/head.go
+++ b/pkg/local_object_storage/engine/head.go
@@ -151,18 +151,3 @@ func Head(ctx context.Context, storage *StorageEngine, addr oid.Address) (*objec
 
 	return res.Header(), nil
 }
-
-// HeadRaw reads object header from local storage by provided address and raw
-// flag.
-func HeadRaw(ctx context.Context, storage *StorageEngine, addr oid.Address, raw bool) (*objectSDK.Object, error) {
-	var headPrm HeadPrm
-	headPrm.WithAddress(addr)
-	headPrm.WithRaw(raw)
-
-	res, err := storage.Head(ctx, headPrm)
-	if err != nil {
-		return nil, err
-	}
-
-	return res.Header(), nil
-}
diff --git a/pkg/services/object/delete/exec.go b/pkg/services/object/delete/exec.go
index 22928dcd5..c2f92950f 100644
--- a/pkg/services/object/delete/exec.go
+++ b/pkg/services/object/delete/exec.go
@@ -17,6 +17,8 @@ import (
 	"go.uber.org/zap"
 )
 
+var errDeleteECChunk = errors.New("invalid operation: delete EC object chunk")
+
 type execCtx struct {
 	svc *Service
 
@@ -66,13 +68,16 @@ func (exec *execCtx) newAddress(id oid.ID) oid.Address {
 }
 
 func (exec *execCtx) formExtendedInfo(ctx context.Context) error {
-	_, err := exec.svc.header.head(ctx, exec)
+	obj, err := exec.svc.header.head(ctx, exec)
 
 	var errSplitInfo *objectSDK.SplitInfoError
 	var errECInfo *objectSDK.ECInfoError
 
 	switch {
 	case err == nil:
+		if ech := obj.ECHeader(); ech != nil {
+			return errDeleteECChunk
+		}
 		return nil
 	case errors.As(err, &errSplitInfo):
 		exec.splitInfo = errSplitInfo.SplitInfo()